Clinics in Obstetrics Tania Gurdip Singh
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1Long Cases
SECTION OUTLINES
  • Antenatal Care
  • Tania G Singh
  • Anemia in Pregnancy
  • Tania G Singh
  • Recurrent Pregnancy Loss
  • Tania G Singh
  • Antepartum Hemorrhage in Early Pregnancy
  • Tania G Singh
  • Antepartum Hemorrhage inLate Gestation
  • Tania G Singh
  • Uterine Size More than Expected
  • Tania G Singh
  • Uterine Size Less than Expected
  • Tania G Singh
  • Diabetes in Pregnancy
  • Tania G Singh
  • Hypertensive Disorders in Pregnancy (HDP)
  • Tania G Singh
  • Previous Cesarean Section
  • Tania G Singh
  • Pain Abdomen during Pregnancy
  • Tania G Singh, Earl Jaspal
  • Breech Presentation
  • Tania G Singh
  • Cardiac Disease in Pregnancy (Part I)
  • Tania G Singh
  • Cardiac Disease in Pregnancy (Part II)
  • Tania G Singh
  • Pyrexia in Pregnancy
  • Tania G Singh, Earl Jaspal
  • Postpartum Hemorrhage
  • Tania G Singh
  • Puerperium
  • 2Tania G Singh, Earl Jaspal

Antenatal CareCHAPTER 1

Tania G Singh
Obstetrics (in Latin ‘obstare’ means ‘to stand by’): It is the branch of medicine that deals with the care of women during pregnancy, childbirth, and the recuperative period following delivery.
Awareness of all signs, symptoms and various examinations pertaining to a particular gestational age is immensely important (which forms the basis of ‘Obstetrics’).
A pregnant patient can approach a doctor at any period of gestation.
Before moving on to the history, a student should first be aware of what the patient will complain about, what he has to look for and which investigations are to be done and at which period of gestation.
Without the knowledge of all normal signs and symptoms of pregnancy, it is nearly very difficult to take history in a normal antenatal case.
 
First Trimester (First 12 Weeks of Pregnancy)
The first antenatal visit (between 6 and 10 weeks).
 
CLINICAL FEATURES
 
Symptoms
  • Amenorrhea
  • Nausea and vomiting
  • Frequency of micturition
    • Due to congestion and pressure on the bladder
    • Appears from 8 to 12 weeks
    • Reappears again near the end of pregnancy when the fetal head descends into the maternal pelvis
  • Breast changes
    • Discomfort
    • Enlargement
    • Pain/heaviness
  • Fatigue/lassitude
  • Change in appetite
    • Craving for certain foods, odors and particular objects
  • Sleepiness
  • Emotional changes/mood swings
4
 
Signs
 
Breast Signs
  • Appear at 6 to 8 weeks
  • Enlargement with vascular engorgement
  • Discomfort—fullness, heaviness and pricking sensation
  • Nipple and primary areola become more pigmented and sensitivity increases
  • Montgomery’s tubercles appear
  • Expression of colostrum as early as 12th week
  • More in primigravidae.
 
Pelvic Signs
Placental sign
Bleeding at the time of the next menstruation.
Hartman’s sign
Implantation bleeding.
Ladin’s sign
  • A clinical sign of pregnancy in which there is softening in the midline of the uterus anteriorly at the junction of the uterus and cervix
  • Occurs at about 6 weeks gestation.
Goodell’s sign
  • A significant softening of the vaginal portion of the cervix from increased vascularization of uterus in pregnancy
  • Named after William Goodell
  • Can be seen at 6th week.
Von Braun-Fernwald’s sign
  • A clinical sign in which there is an irregular softening and enlargement of the uterine fundus during early pregnancy
  • Occurs at 5 to 8 weeks gestation
  • Named after Karl von Braun-Fernwald.
Chadwicks sign
  • Bluish discoloration of the cervix, vagina and labia resulting from increased blood flow
  • Can be observed as early as 6 to 8 weeks after conception
  • Discovered in 1836 by a French doctor, Étienne Joseph Jacquemin
  • James Read Chadwick drew attention to it in 1886.
Piskaçek’s sign
  • Named after Ludwig Piskaçek and Kevin
  • Can be observed at 7 to 8 weeks
  • One half of uterus—more firm than other half (implantation site)
  • Observing a soft palpable bulge at the uterine cornu.
Osiander’s sign
Increased pulsations felt through lateral fornix by 8 weeks.
5Hegar’s sign
  • Its absence does not exclude pregnancy
  • Bimanual examination with two fingers in the anterior fornix and the fingers of the other hand on the abdomen behind the uterus
  • The internal and external fingers can be approximated due to the fact that the lower segment is soft and empty and upper part of the body of the uterus is enlarged → fingers of both the hands can be approximated against the soft uterine isthmus
  • Present from 6 weeks until the 12th week of pregnancy
  • Difficult to recognize in multiparous women
  • Described by Ernst Ludwig Alfred Hegar, a German gynecologist, in 1895.
Palmer’s sign
  • Regular and rhythmic contractions of the uterus in early pregnancy
  • Pregnancy should be of at least 8 weeks duration
  • Method:
    • Two fingers of gloved right hand are placed into the vagina and left hand palpates the lower abdomen from above
    • Wait for 2 to 3 minutes → uterus becomes firm and then ill-defined in accordance to its contraction and relaxation.
    (In the presence of USG, Palmer’s sign and Hegar’s sign have lost their importance.)
 
Uterus
  • Remains a pelvic organ until 12th week
  • From 12 to 14 weeks, it can be felt as suprapubic bulge.
 
Vagina and Vulva
  • Vagina and vulva are bluish/violet in color, particularly the vestibule
  • Vagina becomes moist, warm and lax
  • There is an increase in the amount and acidity of the vaginal discharge.
(None of the early clinical signs of pregnancy are reliable. Pregnancy needs to be confirmed by UPT and/or USG.)
 
LABORATORY TESTS
 
Immunological Tests for the Diagnosis of Pregnancy
 
Principle
Measurement of human chorionic gonadotropin (hCG) in maternal urine or serum with antibody, either polyclonal or monoclonal, available commercially.
 
Tests Used
Urine pregnancy tests
  • Agglutination test: Latex particles or sheep erythrocyte (tube) coated with anti-hCG
  • Agglutination inhibition tests
  • Dip stick test
  • Rapid and simple tests based on enzyme-labeled monoclonal antibodies assay.
6Causes of false positive results
  • Proteinuria
  • Hematuria
  • Done at the time of ovulation (cross-reaction with Luteinizing hormone)
  • hCG injection for infertility treatment within the previous 30 days
  • Thyrotoxicosis (high TSH)
  • Early days after delivery or abortion
  • Trophoblastic diseases
  • hCG secreting tumours.
  • Premature menopause (high LH and FSH)
Causes of false negative results
  • Missed abortion
  • Ectopic pregnancy
  • Too early pregnancy
  • Urine stored too long at room temperature
  • Interfering medications.
Serum pregnancy tests
  • Radioimmunoassay of β-subunit of hCG
  • Radio receptor assay.
Test using both urine and serum
  • Enzyme-linked immunosorbent assay (ELISA)
    Sensitivity
    Time to complete
    Postconception age when first positive
    Gestational age when first positive
    Radioimmunoassay
    5 mIU/mL
    4 hours
    10–18 days
    3–4 weeks
    Immunoradiometric assay (more sensitive)
    150 mIU/mL
    30 minutes
    18–22 days
    4 weeks
    Immunoradiometric assay (less sensitive)
    1500 mIU/mL
    2 minutes
    25–28 days
    5 weeks
    Enzyme-linked immunosorbent assay (more sensitive)
    25 mIU/mL
    80 minutes
    14–17 days
    3.5 weeks
    Enzyme-linked immunosorbent assay(less sensitive)
    <50 mIU/mL
    5–15 minutes
    18–22 days
    4 weeks
    Fluoroimmunoassay
    1 mIU/mL
    2–3 hours
    14–17 days
    3.5 weeks
  • hCG is detectable in the serum
    • In ≈ 5% of patients, 8 days after conception and
    • In > 98% of patients, by day 11.
  • At 4 weeks’ gestation (Day 18–22 postconception), the dimer and β-subunit of hCG doubling times are approximately 2.2 days (standard deviation ± 0.8 days)
  • It falls to 3.5 days (standard deviation ± 1.2 d) by 9 weeks’ gestation
  • Levels peak at 10 to 12 weeks’ gestation and then begin to decline rapidly until another, more gradual rise begins at 22 weeks’ gestation, which continues until term.
The pregnancy test becomes negative about:
  • 1 week after labor
  • 2 weeks after abortion
  • 4 weeks after evacuation of vesicular mole.
7
 
Progesterone
  • Serum progesterone is a reflection of progesterone production by the corpus luteum, which is stimulated bya viable pregnancy
  • Measured by radioimmunoassay and fluoroimmunoassay
  • Results after 3 to 4 hours
  • A dipstick ELISA that can determine a serum progesterone level of < 15 ng/mL is also available
  • Serumprogesterone
    • > 25 ng/mL → viable intrauterine pregnancy (97.5% sensitivity)
    • < 5 ng/mL → a nonviable pregnancy (100% sensitivity)
    • 5 to 25 ng/mL → further testing using ultrasound, additional hormonal assays or serial examinations are warranted.
 
Early Pregnancy Factor
  • Early pregnancy factor (EPF) assay may be useful in the future as an aid in diagnosing pregnancy before implantation
  • It is a poorly defined immunosuppressive protein that is present in maternal serum shortly after conception
  • The earliest available marker to indicate fertilization
  • Detection:
    • Detectable in the serum 36–48 hours after fertilization
    • Peaks early in the first trimester
    • Almost undetectable at term
    • Also appears within 48 hours of successful IVF embryo transfers
    • Cannot be detected 24 hours after delivery or at the termination of an ectopic or intrauterine pregnancy
    • Also undetectable in many ectopic pregnancies and spontaneous abortions, indicating that if EPF is not identified, that pregnancy may represent a poor prognosis
  • Today EPF has limited clinical application because the molecule is difficult to isolate
  • Detection of EPF currently relies on a complex and unwieldy assay named the rosette inhibition test.
 
Home Pregnancy Tests
  • These tests now use the modern immunometric assay
  • Most of these tests claim ‘99% accuracy’
  • The broad 99% accuracy statement is made for tests with sensitivities for hCG concentrations ranging from 25 mIU/mL (fairly sensitive) to tests with sensitivities of 100 mIU/mL (less sensitive)
  • Home pregnancy tests are most commonly used in the week after the missed menstrual period (fourth completed gestational week)
  • Urine hCG values are extremely variable at this time and can range from 12 mIU/mL to > 2500 mIU/mL
  • This variability continues into the fifth week, when values have been shown to range from 13 mIU/mL to > 6000 mIU/mL
  • Both weeks have a percentage of urine hCG values that is below the sensitivities of detection for common home pregnancy tests (range 25–100 mIU/mL)
  • Therefore, during 4th and 5th weeks, they may not be highly accurate
  • 8 Collection of urine for the test:
    • Try to perform first thing in the morning, though this is not mandatory
    • Collect urine in a clean, dry, plastic container
    • Wash only with water
    • Ensure that there is no detergent residue in the container
    • Take out the strip from the pack and keep it on a flat surface
    • Put about 2 to 3 drops of urine on it with a dropper (provided in the kit)
    • Do not spill urine on the reading strip
    • Wait for 3 to 5 minutes (depending on manufacturer’s instructions) and then read the test results
    • Trying to read the results before the stipulated time or waiting too long can both lead to inaccurate readings.
 
Reading the Test
  • ‘C’ indicates a control (this band must always appear because this is the comparison band)
  • ‘T’ indicates the test sample
  • If only one red/pink/purple band appears in the region marked ‘C’, it means that the test is negative
  • If two red/pink/purple bands appear, one in the ‘C’ region and the other in the region marked ‘T’, it means that the test is positive for pregnancy
  • In case no bands appear or if a faint line appears in the ‘T’ region, then the test is invalid
  • Repeat the test with a new pack after 72 hours.
 
Other Routine Blood Tests
  • Hemogram
  • Screening for hemoglobinopathies
  • Complete urine analysis (to detect asymptomatic bacteriuria, if present)
  • VDRL, HIV (after pretest counseling and written consent)
  • ABO Rh. If rhesus negative, check husband’s blood group
  • HbsAg, Anti-HBC Ag
  • Rubella susceptibility
  • USG to confirm intrauterine gestation, cardiac activity, measure gestational age using CRL, to rule out multiple gestation and ectopic pregnancy
  • Cervical cytology, if indicated
  • A wet smear of any symptomatic vaginal discharge (i.e. itching, burning or offensive)
  • Down’s syndrome screening using:
    • ‘Combined test’ (nuchal translucency, β-hCG, pregnancy-associated plasma protein-A) at 10+0 to 13+6 weeks
    • Ultrasound for nuchal translucency between 10+0 and 14+0 weeks (CRL 36–84 mm).
 
Indications for Prenatal Counseling and Screening
Prepregnancy
  • Maternal age ≥ 35 years
  • Consanguinity, ethnicity, family history of genetic disorder
  • History of recurrent spontaneous abortions, stillbirths, neonatal deaths and malformations in previous babies
  • Family history of a known/suspected genetic disorder, e.g. thalassemia, muscular dystrophy, cystic fibrosis, Down’s syndrome.
9
Antenatal
  • Abnormal fetal USG
  • Abnormal maternal serum screening
  • Teratogen exposure
  • Maternal infection.
Summary of prenatal genetic screening tests
Noninvasive tests
Screen name
Markers
Possible timeframes
Best timeframes
1st trimester
USG
NT
11–13 wks 6d
12–13 wks 3d
Combined screen
NT + PAPP A + hCG
10–13 wks 6d
10 wks 2d–11 wks 6d
2nd trimester
Triple test
MSAFP + uE3 + hCG
15–20 wks
Quadruple test
hCG + Inhibin A + MSAFP + uE3
15–20 wks 6d
15 wks 2d–17 wks
USG
Anomaly scan
18–22 wks
Combined 1st and 2nd trimesters
IPS (integrated prenatal screen)
PAPP + NT in 1st trimester and Quadruple in 2nd trimester
Reports given only after both the tests (by making single risk determination)
SIPS (serum
integrated prenatal
screen)
PAPP A + Quad test
(w/o NT)
Stepwise
sequential
screening
PAPP A + NT with an age associated risk If at ↑ risk → 2 options Invasive testing in 1st trimester OR Triple or Quad test in 2nd trimester
1st trimester
 
Interpretation of Various Markers
Maternal serum α fetoprotein (AFP)
  • Oncofetal → produced by yolk sac initially and after its involution, by fetal liver (in early pregnancy)
  • AFP is present in amniotic fluid initially through diffusion across immature skin and later through kidneys and fetal urination
  • Amniotic fluid AFP is swallowed by fetus and recirculates with final degradation by fetal liver
  • Very small amounts are present in maternal serum through diffusion across the placenta and amnion
  • Levels:
    • Nonpregnancy levels → 1 μ/L
    • 16 to 18 weeks period of gestation → 18 to 40 μ/L
    • When fetal serum level is 2 μ/L and maternal serum level is 20 μ/L → amniotic fluid AFP will be 20,000 μ/L
  • Fetal plasma and amniotic fluid AFP → peak in midtrimester of pregnancy
  • Maternal serum AFP →↑ until 28 to 32 weeks of gestation
    10
    Elevated in
    Reduced in (<0.25 mm)
    • Multiple gestation
    • Fetal demise
    • Fetomaternal hemorrhage
    • Placental abnormalities
    • Uterine abnormalities
    • Maternal ovarian or hepatic tumour
    • Fetal congenital defects
    Spontaneous abortion
    Preterm labor/delivery
    Stillbirth
    Infant death
    Macrosomia
    Obstetric complications (when)
    IUGR
    1. Neural tube defect
      1. Spina bifida
      2. Anencephaly
      3. Encephalocele
    2. Open ventral wall defect
      1. Omphalocele
      2. Gastroschisis
    3. Congenital nephrosis (because of fetal proteinuria)
    4. Triploidy
    5. B/L renal agenesis
    6. Congenital skin disorders
      1. Aplasia cutis
      2. Epidemolysis bullosa
    7. Autosomal recessive PCKD
    8. Sacrococcygeal teratoma
    9. Cystic adenomatoid malformation of lung
    APH
    Preterm labor/delivery
    Fetal death >24 weeks
    Spontaneous abortion
    Gestational hypertension and
    preeclampsia
    Polyhydramnios
    Low Apgar
    Asphyxia
    NICU admission
  • Unexplained increase of maternal serum AFP
    • AFP>2.5 MOM in the absence of the above-mentioned causes
    • Associated with:
      • Chorionic villitis and placental vascular lesions
      • Maternal uterine malformation
  • Increase AFP in amniotic fluid and maternal serum → only when NTDs are open, i.e. when neural tissue is exposed or covered by only a thin membrane
  • When NTDs are skin covered, AFP does not escape from fetal circulation and there is no increase of AFP in the mother
  • AFP is an important screening test because 80% of infants with NTD are born into families with no prior history of disorder
  • Optimal time for screening (for NTDs)
    • 16 to 18 weeks
    • When LMP is known, dating done is according to it
    • When LMP is not known, dating is done according to BPD in the 2nd trimester (at 14 weeks)
      • BPD is usually smaller in fetuses with spina bifida and maternal serum AFP will appear higher; therefore, improved detection rate
  • Other factors which affect MSAFP
    • Maternal weight → obese females have ↓ levels (because larger size results in greater dilution of fetally derived AFP)
    • Race: Black and Asian females > nonblack race
    • IDDM → levels are lower
    • Multifetal reduction in 1st trimester →↑ levels in 2nd trimester
  • 11 Summary
    Increase in:
    • Neural tube defects
    • Trisomy 18
    Decrease in:
    • Down’s syndrome.
Maternal serum hCG
  • Secreted by syncytiotrophoblasts
  • Elevated hCG
    • Cut-offs varying from > 2.0 MoM to > 4.0 MoM
    • Causes:
      • Fetal chromosomal abnormalities (Down’s syndrome)
      • Placental anomalies (Molar pregnancy)
      • Multiple pregnancy
      • IUFD
      • Hypoxic cytotrophoblasts demonstrate increased proliferation and increased hCG production
      • Other placental abnormalities
        • Chorioangiosis of placenta (abnormal capillary proliferation associated with uterine hypoxia)
        • Placental mosaicism
  • Obstetric complications with unexplained elevation:
    • IUGR
    • Hypertensive disorders of pregnancy
    • Preterm labor and preterm delivery
    • Stillbirth
    • Velamentous cord insertion
  • Low hCG
    • Defined as a value < 0.5 MoM
    • Unexplained low hCG:
      • Normal fetal anatomy
      • Viable pregnancy
      • Normal fetal karyoptype
      • Pregnancy outcomes, when low hCG
      • In 1st trimester—miscarriage
      • In 2nd trimester—normal
  • Summary
    Decrease in:
    • Trisomy 18
    No change in:
    • NTDs
Maternal serum unconjugated estriol (uE3)
  • How and where is it produced?
    • Fetal adrenal glands produce DHEAS
    • Fetal liver converts DHEAS to 16 α OH-DHEAS
    • Inplacenta, 16 α OH-DHEAS is deconjugated by a sulfatase
    • Resulting molecule is aromatized to uE3
  • 12 Decrease in trisomy 21 and 18
  • No change in open NTDs
  • High levels are not associated with adverse perinatal outcomes
  • Low levels (<0.75 MoM) are associated with:
    • Fetal chromosomal abnormalities
    • Fetal death
    • Fetal metabolic conditions
      • Steroid sulfatase deficiency
      • Congenital adrenal hypoplasia/Hypocortisolism
      • Smith-Lemli-Opitz syndrome
      • Placental aromatase deficiency
      • Kallman syndrome
  • Complications (when low)
    • IUGR
    • Small for gestational age
    • IUFD
    • Oligohydramnios.
Maternal serum inhibin A
  • Levels are much reduced in primary antiphospholipid antibody syndrome
  • Levels are much increased in:
    • Triploidy
    • HELLP syndrome
    • Following loss of 1 twin in 1st trimester
  • Obstetric complications (when levels are increased → ≥ 2 MoM)
    • IUGR
    • Preterm delivery
    • IUFD
    • Hypertensive disorders
  • Summary
    Increase in:
    • Down’s syndrome
    No change in:
    • Open NTDs
    • Trisomy 18.
Maternal serum pregnancy associated with plasma protein-A (PAPP-A)
  • Produced by placenta and decidua
  • Increases the bioavailability of IGF, which, in turn, mediates trophoblast invasion and modulates glucose and amino acid transport in the placenta
  • Levels increased
    • No adverse outcome
  • Levels decreased
    • Spontaneous abortions
    • IUGR
    • Preterm delivery
    • IUFD
    • Hypertensive disorders.
    13
    Recommendations
    • 1st trimester: Combined screening
    • 2nd trimester: Quadruple or triple test
 
ULTRASONOGRAPHY
 
Transvaginal
Period of gestation (weeks)
Ultrasound features
Week 4
Gestational sac
  • Gestational sac size = 3 to 6 mm
  • Grows at the rate of 1 mm/day through the 9th week
  • Sometimes may not appear by the end of the 5th week
  • Initially round, anechoic structure
  • Gestational age calculation
    • When no structures are visible within the gestational sac:
      • Mean sac diameter (MSD) in mm + 30 = Gestational age in days
    • When embryo is seen inside it, MSD is no longer accurate
Week 5
Gestational sac
  • Size = 6–12 mm
Yolk sac
  • Seen with TVS when mean sac diameter is ≈ 8 mm to 10 mm
  • Its presence confirms the diagnosis of an intrauterine pregnancy
  • By 5 weeks 4 days, it should definitely be present
Fetal pole
  • Adjacent to yolk sac (near the wall)
Cardiac activity
  • By the end of the 5th week
  • Normal heart rate at this time = 60–90 bpm (In early pregnancies, the actual cardiac rate is less important than its presence or absence)
  • Must be detected when embryo length is 5 mm
Lacunar structures
  • Cavities or spaces at the site of implantation
Week 6
Gestational sac
  • Size = 14–25 mm
Crown rump length
  • Gestational age in the 1st trimester is calculated from the fetal CRL (± 6 days)
  • This is the longest demonstrable length of the embryo or fetus, excluding the limbs and the yolk sac
  • Most accurate between 7 and 10 weeks of pregnancy
  • From 6 to 11 weeks, CRL grows at a rate of ≈ 1 mm/day
  • CRL = 4–7 mm
Fetal pole
  • Length = 0.2–0.3 inches
  • Grows at the rate of about 1 mm/day, from 6th week
‘Dating the fetus
  • Gestational age = 6 weeks plus (CRL in days)
  • Example: CRL 16 mm (2 wks 2 days) would have a gestational age of 8 wks and 2 days
14
Week 7
CRL (crown to rump length)
  • 5 mm to 12 mm
Length
  • < 0.5 inch
Weight
  • < 1 g
Heart rate
  • Increases from 130–160 bpm
Other features:
  • Heart is beating with one chamber
  • A dividing wall is formed in the heart
  • Arm and leg buds begin to grow
  • The lower jaw and the vocal cords are beginning to form
  • The mouth opening is formed
  • The inner ear is being created
  • The digestive tract is developing
  • The navel string is being created
  • The following organs are being formed: the lungs, the liver, the pancreas and the thyroid gland
  • Neural tube begins to fuse
Week 8
CRL
  • 16 mm to 20 mm
Length
  • 0.6 to 0.9 inch
Weight
  • Approximately 1 g
Fetal structures (at the end of the 8 th week):
  • Elbows
  • Feet buds
  • Hands bud
  • Even fingers are visible
  • Initiate minor movements
  • Stomach is being made from part of the gut
  • Face begins to take shape
  • Mouth and nostrils start developing
  • Teeth begin to develop under the gums
  • Eyes can now be seen as small hollows on each side of the head
  • Brain cavities—seen as large ‘holes’ in the embryonic head
  • Heart
    • Rate—160 bpm
    • Covers ≈ 50% of the chest area
  • Sometimes, it is possible to recognize the fluid-filled stomach below the heart
15
Week 9
CRL → 20–30 mm
Length → 0.9 to 1.2 inch
Weight → 2g
Other features:
  • Fingers and toes well defined
  • Cartilage and bones begin to form
  • Upper lip as well as the nose tip is being formed
  • Tongue begins to develop and the larynx is developing
  • Eyelids are developed, although they stay closed for several months
  • Main construction of the heart is complete
  • Heart rate reaches a maximum of about 175 bpm
Week 10
CRL → 31–41 mm (1.2 to 1.6 inches)
Weight → 2–4 g
Other features:
  • From this week until birth, the developing organism is called a fetus
  • Size of fetus → of a small strawberry
  • Feet are 2 mm long
  • Neck is beginning to take shape
  • Body muscles are almost developed
  • Fetus has begun movement, even shifts
  • Jaws are in place
  • Mouth cavity and the nose are joined
  • Ears and nose seen clearly
  • Fingerprints are already evident in the skin
  • Nipples and hair follicles begin to form
Week 11
CRL → 41-54 mm
Length → 1.6 to 2 inches
Weight → 7 g
Other features:
  • Fingers and toes have completely separated
  • Taste buds start developing
  • Fetus has tooth buds, the beginning of the complete set of 20 milk teeth
  • Can swallow and stick out the tongue
  • Whole body except the tongue is sensitive to touch
  • Cartilage now calcifying to become bone
Week 12
Fetus is ≈ 6.5 cm long
Weight → 14–20 g
Other features:
  • Fetus starts moving spontaneously
  • Face is beginning to look like a baby’s face
  • Fingernails and toenails appear
  • Fetus can suck the thumb and get hiccups
Nuchal translucency and nasal bone (described henceforth)
16
 
Nuchal Translucency (NT)
  • Single most powerful marker for Down’s syndrome
  • Refers to normal subcutaneous fluid-filled space between back of fetal neck and overlying skin
  • Seen in all normal fetuses
  • Called ‘translucency’ because, on ultrasound, this appears as a black space beneath the fetal skin
  • Normally < 2.5 mm
  • ≥ 2.5 mm → may indicate Down’s syndrome or another chromosomal abnormality
  • Time: 10 to 14 weeks (CRL 36–84 mm)
    Condition
    NT
    Trisomy 21
    Trisomy 18
    Pregnancy loss <24 weeks
    Congenital heart defect
 
How to Measure?
  • Midsagittal plane with fetal spine down
  • Image—magnified. Only head, neck and upper thorax should be visible
  • Neck—neutral (neither hyperflexed or hyperextended)
  • Skin at fetal back clearly differentiated from underlying amniotic membrane
    How?
    1. Look for separate echogenic lines
    2. Note that skin line moves with fetus
  • Calipers on inner border of echolucent space and perpendicular to long axis of fetus
 
Possible Causes for Increased Fluid-filled Space
  • Cardiac failure 2° to structural malformation
  • Abnormality in extracellular matrix
  • Abnormal or delayed development of lymphatic system.
Septated cystic hygroma: When NT space is enlarged extending along entire length of fetus and in which septations are clearly visible.
 
Nasal Bone
  • Clear association between absence of fetal nasal bone and Down’s syndrome but absent Nasal Bone (NB) is not related to NT
  • It is an independent marker
  • Occasionally it may not be seen at 11 weeks.
 
How to Visualize?
  • Midsagittal plane
  • Spine position
  • Slight neck flexion
  • 17Two echogenic lines at fetal nose profile should be visualized
    Superficial: Nasal skin
    Deeper: Nasal bones (should be more echolucent at its distal end)
  • USG beam should not be parallel to the plane of nasal bone because this will lead to error of ABSENT nasal bone.
 
Optimal Timing of USG for Fetal Anomalies
  • Anencephaly
  • Spina bifida
  • Limbs (all long bones should be measured)
  • Hydrocephalus/microcephaly
  • Renal (especially obstructive uropathy)
  • Face and mouth
  • Anterior abdominal wall
  • 10–12 weeks
  • 16–18 weeks
  • 16+ weeks (serial at 4 weeks interval)
  • 16+ weeks (serial at 4 weeks interval)
  • 16+ weeks (serial at 4 weeks interval)
  • 18–22 weeks (preferably 3D or 4D)
  • 16–18 weeks
 
Following Important Points to be Explained at this Juncture
  • Antenatal care should start at the time pregnancy is confirmed
  • Booking visit should be as early as possible, preferably when the second menstrual period has been missed, i.e. at a gestational age (duration of pregnancy) of 8 weeks
  • Ideally 8 to 10 antenatal appointments for nulliparous and 6 to 7 for parous women
  • Basic investigations and appropriate screening tests must be done to identify high-risk patients
  • Exercise (brisk walking) for 30 to 40 minutes 5 days/week seems to be appropriate
  • Folic acid (400 micrograms/day, till 12 completed weeks to reduce the risk of neural tube defects) and vitamin D (10 micrograms/day) should be prescribed
  • Vitamin A intake > 700 micrograms might be teratogenic and should, therefore, be avoided
  • Diet, proper calorie intake and ideal weight gain should be explained at the beginning to avoid complications later in pregnancy.
 
PREGNANCY DIET AND WEIGHT GAIN
 
Types of Diet
Vegan: This diet includes fruits, vegetables, beans, grains, seeds and nuts. All animal sources of protein—including meat, poultry, fish, eggs, milk, cheese and other dairy products—are excluded from the diet.
Lacto-vegetarian: This diet includes dairy products in addition to the foods listed above in the vegan diet. Meat, poultry, fish and eggs are excluded from the diet.
Lacto-ovo-vegetarian: This diet includes dairy products and eggs in addition to the foods listed above in the vegan diet. Meat, poultry and fish are excluded from the diet
Pescatarian: This diet includes dairy products and eggs in addition to the foods listed above in the vegan diet. Meat and poultry are excluded from the diet, but fish is permitted, focusing on the fattier omega-3 rich varieties.
Mixed (nonveg): This diet includes vegies, dairy products, poultry, meat and fish.18
 
General Principles
  • In general, pregnant women need between 2,200 calories and 2,900 calories a day, which should be gradually increased with the growth of the fetus
    • 1st trimester → does not require any extra calories
    • 2nd trimester → additional 340 calories a day are recommended
    • 3rd trimester → recommendation is 450 calories more a day
  • Add variety to your food
  • Protein sources:
    • For vegans: Nuts, peanuts, butter, legumes, soy products, quinoa and tofu
    • For nonvegans: Meat, poultry, fish, eggs or dairy products
  • Choose foods high in starch and fiber, such as whole-grain breads, cereals, pasta, rice, fruits and vegetables
  • Eat and drink at least four servings of calcium-rich foods a day to help ensure that you are getting 1200 mg of calcium in your daily diet. Sources of calcium include dairy products, seafood, green-leafy vegetables, dried beans or peas, and tofu
  • Vitamin D helps the body absorb calcium. Adequate amounts of vitamin D can be obtained through exposure to the sun and in fortified milk, eggs and fish. Vegans should receive 10 to 15 minutes of direct sunlight to the hands, face or arms three times per week or take a supplement
  • Eat at least three servings of iron-rich foods per day to ensure getting 27 mg of iron in the daily diet. Sources of iron include enriched grain products (rice), eggs, green-leafy vegetables, broccoli, Brussels sprouts, sweet potatoes, dried beans and peas, raisins, prunes and peanuts
  • Choose at least one source of vitamin C everyday. Sources of vitamin C include oranges, grapefruits, strawberries, honeydew, broccoli, cauliflower, Brussels sprouts, green peppers, tomatoes and mustard greens
  • Choose at least one source of folic acid everyday. Sources of folic acid include dark, green-leafy vegetables, and legumes, such as lima beans, black beans, black-eyed peas and chickpeas
  • Choose at least one source of vitamin A every alternate day. Sources of vitamin A include carrots, pumpkins, sweet potatoes, spinach, squash, turnip greens, beet greens, apricots and cantaloupe
  • Choose at least one source of vitamin B12 a day. Vitamin B12 is found in animal products including fish and shellfish, eggs and dairy products. Vegans are at risk of not consuming enough vitamin B12
  • Avoid:
    • Leftover food
    • Frozen and deep-frozen food
    • Cold drinks
    • Tobacco
    • Alcohol
    • Smoking
  • Liver and liver products may also contain high levels of vitamin A, and, therefore, consumption of these products should also be avoided
  • Tea, coffee, chocolates and ice-cream can be taken only in moderation (only 2 cups of either tea or coffee permitted/day). Chocolate contains caffeine—the amount of caffeine in a chocolate bar is equal to 1/4th cup of coffee
  • Those who suffer from constipation, gas and bloating must avoid peas and other ‘heavy-to-digest’ cereals and potatoes. They must take green gram as it is easy to digest and gives protein
  • Butter, clarified butter, milk, honey, fennel seeds and sweets made from jaggery rather than white sugar can be taken in small quantity
  • 19 Items such as sandwich, bakery bread, bun, dhokla, pizza, khandvi, pancake, khaman dhokla, steamed rice cake, curd, tomato, tamarind and kadhi usually increase the swellings and acidity. So, try to avoid such items but if such problems do not exist, you can take in small quantity
  • Most important, water intake should, by no means, be < 2.5 liters/day
  • Limit fats and cholesterol
  • DO NOT DIET or try to lose weight during pregnancy.
 
Calorie Chart for Basic Food Items
 
Fruits per 100 Grams
  • Apple 56
  • Avocado Pear 190
  • Banana 95
  • Chickoo 94
  • Cherries 70
  • Dates 281
  • Grapes (Black) 45
  • Guava 66
  • Kiwi Fruit 45
  • Lychees 61
  • Mangoes 70
  • Oranges 53
  • Orange juice 100 mL 47
  • Papaya 32
  • Peach 50
  • Pears 51
  • Pineapple 46
  • Plums 56
  • Strawberries 77
  • Watermelon 26
  • Pomegranate 77
 
Vegetables per 100 Grams
  • Broccoli 25
  • Brinjal 24
  • Cabbage 45
  • Carrot 48
  • Cauliflower 30
  • Fenugreek (Methi) 49
  • French beans 26
  • Lettuce 21
  • Mushroom 18
  • Onion 50
  • Peas 93
  • Potato 97
  • Spinach 23
  • Tomato 21
  • Tomato juice 100 mL 22
20
 
Cereals per 100 Grams
  • Bajra 360
  • Maize flour 355
  • Rice 325
  • Wheat flour 341
 
Indian Breads (Per Piece)
  • 1 medium chapatti 119
  • 1 slice white bread 60
  • 1 paratha (no filling) 280
 
Milk and Milk Products (Per Cup)
  • Butter 100 g 750
  • Buttermilk 19
  • Cheese 315
  • Cream 100 g 210
  • Ghee 100 g 910
  • Milk (Buffalo) 115
  • Milk (Cow) 100
  • Milk (Skimmed) 45
 
Calories in Other Items
  • Sugar 1 tbsp 48
  • Honey 1 tbsp 90
  • Coconut water 100 mL 25
  • Coffee 40
  • Tea 30
 
Weight Gain in Pregnancy
  • Underweight: BMI below 18.5
  • Normal weight: 18.5 to 24.9
  • Overweight: 25.0 to 29.9
  • Obese: 30.0 and above
Weeks
Weight gain (Pounds)
Weight gain (kg)
0–10 weeks
10–14 weeks
14–20 weeks
20–30 weeks
30–36 weeks
36–38 weeks
38–40 weeks
Total
No weight gain
3–4 pounds
4–6 pounds
10–12 pounds
6 pounds
2 pounds
Almost no weight gain
25–30 pounds
No weight gain
1.5 kg
2.5 kg
4.5 kg
2.7 kg
1.0 kg
Almost no weight gain
12–14 kg
21
 
Second Trimester (13–28 Weeks)
There should be a minimum of 3 visits in this trimester
 
CLINICAL FEATURES
 
Symptoms
  • Amenorrhea
  • Morning sickness and urinary symptoms decrease
  • Progressive abdominal enlargement.
 
Signs
  • Breasts become engorged
  • Uterus feels soft and elastic, and becomes ovoid-shaped
  • Braxton-Hicks contractions are evident.
 
Vaginal Examination
  • Bluish discoloration of the vulva, vagina and cervix is much more evident
  • Increased softening of the cervix
  • Internal ballottement can be elicited between 16th–28th week. The fetus is too small before 16th week and too large to displace after 28th week.
 
14–16 Weeks
  • Review, discuss and record the results of all the screening tests undertaken in the 1st trimester
  • Colostrum becomes thick and yellowish by 16th week
  • Injection tetanus toxoid 0.5 mL IM (1st dose) should be given
  • Prescribe iron and calcium.
WHO Tetanus toxoid immunization schedule
Dose
When to give
Protection %
Duration of protection
TT-1
At first contact or as early as possible in pregnancy
Nil
None
TT-2
At least 4 weeks after TT-1
80
3 years
TT-3
At least 6 months after TT-2 or during subsequent pregnancy
95
5 years
TT-4
At least 1 year after TT-3 or during subsequent pregnancy
99
10 years
TT-5
At least 1 year after TT-4 or during subsequent pregnancy
99
Throughout childbearing
  1. Hemogram
    • If hemoglobin level is <10 g/100 mL, investigate and consider additional iron supplementation
    • If MCH <27 picograms, offer HPLC (high performance liquid chromatography)
    • If woman is found to be carrier of a clinically significant hemoglobinopathy, father should also be screened without delay.
  2. 22 Rhesus negative blood group
    • If Rh negative blood group with husband rhesus positive, offer indirect coomb’s test
    • If ICT is negative, repeat at 28 and then at 34 weeks
    • If positive, send for anti-D antibodies titer.
  3. VDRL positive
    • If either the VDRL (Venereal Disease Research Laboratory) or the RPR (Rapid Plasmin Reagin) test is negative, then the patient does not have syphilis and no further tests for syphilis are needed
    • If the titer is ≥1:16, the patient has syphilis and must be treated
    • If the titer is ≤ 1:8, the laboratory should test the same blood sample by means of the TPHA (Treponema Pallidum Hemagglutin Assay) or FTA (Fluorescent Treponemal Antibody) test:
      1. If the TPHA (or FTA) test is also positive, the patient has syphilis and must be fully treated
      2. If the TPHA (or FTA) is negative, then the patient does not have syphilis and, therefore, need not be treated
      3. If a TPHA (or FTA) cannot be done, and the patient has not been fully treated for syphilis in the past 3 months, she must be given a full course of treatment.
  4. HIV positive
    • Confirm by western blot or repeat ELISA.
  5. Screening for fetal anomalies
    • For women who book later in pregnancy, serum screening test (triple or quadruple test) should be offered between 15+0 and 20+0 weeks
    • If the result is screen positive for Down’s syndrome or any other abnormality, she should be given the option for amniocentesis or chorionic villus sampling.
 
18–20 Weeks
Symptoms and signs
  • Breast → enlarged with prominent veins under the skin
  • Quickening:
    • When movements made by the fetus are perceived for the first time by the mother
    • Occurs at 18–20 weeks in primigravida
    • At 16–18 weeks in multigravida
  • At 20 weeks, the following can be usually observed:
    • Secondary areola
    • Prominent montgomery’s tubercles extend to the secondary areola
    • Variable degree of striae (both pink and white) may be visible in lower abdomen
    • Linea nigra
    • Palpation of fetal parts
    • Active fetal movements
    • External ballottement (fetus is relatively smaller than the volume of the amniotic fluid)
    • Fetal heart sound detected with stethoscope
    • Two other sounds confused with FHS are:
      Uterine soufflé:
      • Soft blowing and systolic
      • Synchronous with maternal pulse
      • Due to increased blood flow through the dilated uterine vessels
      Funic or fetal soufflé:
      • Due to rush of blood through the umbilical arteries
      • A soft, blowing murmur
      • Synchronous with the FHS
23Investigations
  • Measure weight and blood pressure
  • Detailed ultrasound level II (between 18 and 22 weeks)
  • If any anamoly is detected, further decision accordingly
  • If placenta is found extending to the internal os, repeat scan for placental localization should be offered at 32 weeks
  • Continue iron and calcium
  • Injection TT 0.5 mL IM (2nd dose).
 
24–25 Weeks
  • Face—chloasma gravidarum may appear at 24th week
  • Measure weight and blood pressure
  • Plot symphysis—fundal height
  • Test urine for proteinuria and rule out asymptomatic bacteriuria
  • OGTT with 75 g glucose
  • Fetal echocardiography, if mother has heart disease or any fetal cardiac abnormality detected at the time of anamoly scan.
 
Fundal height (McDonald’s Rule)
Fundal height, or McDonald’s rule, is a measure of the size of the uterus used to assess fetal growth and development during pregnancy. It is measured from the top of the mother’s uterus to the top of the mother’s pubic bone in centimeter.
Gestational age
Fundal height
40 weeks
1–2-finger width below subcostal arch
36 weeks
At costal arch
32 weeks
Between umbilicus and xiphoid process
28 weeks
3-finger width above umbilicus
24 weeks
At umbilicus
20 weeks
3-finger width below umbilicus
16 weeks
3-finger width above symphysis
 
Symphysis—Fundal Height (by Tape)
  • To determine:
    • Period of gestation
    • Growth of the fetus
    • Multiple pregnancies
    • Complications of pregnancy, e.g. amniotic fluid disorders, hydatidiform mole and fetal growth disturbances
  • Between 20 and 34 weeks gestation, the height of the uterus correlates closely with measurements in centimeter (except in obesity)
24Step I
  • Explain the procedure to the mother and gain verbal consent
  • Wash hands
  • Obtain a nonelastic measuring tape
  • Ensure that the mother is comfortable in a supine position and extended legs, with an empty bladder
  • Expose enough of the abdomen to allow a thorough examination.
Step II
  • Ensure the abdomen is soft (not contracting)
  • Perform abdominal palpation to enable accurate identification of the uterine fundus.
Step III
  • Use the measuring tape with the centimeter on the underside to reduce bias
  • Place the zero mark of the tape measure at the uppermost border of the symphysis pubis
  • Measure from the top of symphysis pubis to the top of fundus
  • The tape should stay in contact with the skin.
Step IV
  • Measure along the longitudinal axis without correcting to the abdominal midline
  • Do not hold the tape between the fingers
  • Tape should then be turned so that the numbers are visible and the value can be recorded
  • Measure only once
  • Measurements should be in centimeter only.
Caution:
  • If the bladder is full, it can increase the fundal height by 3 cm
  • Supine position has the least variations in measurements
  • After 34 weeks, it is not recommended as it may give erroneous readings due to descent of fetus into the pelvis
  • A discrepancy of >2 cm should be reported.
 
ULTRASOUND
 
Level II Scan
  • A scan is performed at 18 to 22 weeks when the fetus is large enough for an accurate survey of the fetal anatomy and when dates and growth can also be assessed
  • Also known as—dating, anomaly or targeted scan
  • Measurement of BP, FL, AC, HC, EFW is taken
  • Localization of placenta and amount of liquor is determined
  • Accurate dating can only be done as early in gestation as possible after 13 weeks, after which dating will not be that reliable
  • Detailed Level II scan is beyond the scope of this book but few notable features are worth 25 mentioning.
Period of gestation
Ultrasound features
Weeks 13–17
  • Ribs appear
  • Nose and chin well-defined
  • Opening and closing of mouth
  • External genitalia almost defined
  • Ears fully developed
  • Cheek bones appear
  • First hair appears at 14 weeks
  • Fetus can make a fist at 15 weeks
  • Fat begins to form underneath the skin
  • Baby hears external voices, sleeps and dreams by 16 weeks
  • Umbilical cord grows thicker and stronger
  • Retina has become sensitive to light—week 17
  • First stools (meconium) are now beginning to accumulate by week 17
Weeks 18–24
  • Vernix starts forming
  • Genitals are distinct and recognizable by week 19
  • Scalp hair has sprouted
  • Growth of hair on rest of the body
  • Regular sleeping and waking rhythm
  • Mother’s movements can wake her baby
  • Eyebrows become visible by week 23
  • Fetus weighs around 600 g and is about 30 cm long by week 24
Weeks 25–28
  • Hands—fully developed
  • Brain is growing rapidly
  • Sexual organs are fully developed
  • Eyes begin to open, blink and close
  • Weight is 1000 g and length is almost 37.5 cm by week 28.
At this point, it is important to give a brief description of ultrasonographic changes in amniotic fluid and placenta in an uncomplicated pregnancy.
 
Amniotic Fluid
 
Appearance
  • During the first two trimesters:
    • Clear and yellow
  • During the third trimester:
    • Colorless
  • Approximately from 33 to 34 weeks onwards:
    • Cloudiness and flocculation occur, at first very slowly, then after the 36th–37th week steadily and faster.
  • At term:
    • Moderately cloudy and contains a moderate number of flakes of vernix
  • The appearance of the amniotic fluid, depending on the degree of cloudiness and on the number of flakes, has been expressed by means of a score system, the so-called ‘Macroscore’.
 
Quantity and Constituents
  • Completely surrounds the embryo after the 4th week of pregnancy
  • 26Main constituents are:
1st trimester
  • Water and electrolytes only
2nd trimester
  • Water and electrolytes (99%)
  • Glucose
  • Lipids from the fetal lungs
  • Proteins with bactericide properties
  • Flaked-off fetal epithelium cells (they make a prenatal diagnosis of the infantile karyotype possible)
  • Normally has a pH of 7.0 to 7.5.
 
Quantity Changes
  • 20 mL in the 7th week
  • 400 mL at 20th week
  • 600 mL in the 25th week
  • 800 mL at 28th week
  • 1000 mL in the 30th to 34th weeks
  • 800 mL at birth
  • 400 mL in the 42nd week
  • From the 5th month onwards, the fetus also begins to drink amniotic fluid (400 mL/day)
  • Near to the end of pregnancy, the amniotic fluid is replaced every 3 hours.
 
Functions
  • Amniotic fluid is ‘inhaled’ and ‘exhaled’ bythe fetus—essential for the development of lungs
  • Swallowed amniotic fluid also forms urine and contributes to the formation of meconium
  • Amniotic fluid protects the developing fetus by cushioning against blows to the mother’s abdomen
  • Allowing for easier fetal movements
  • Promotes muscular and skeletal development.
 
Placenta
Placental grading refers to an ultrasound grading system of the placenta depending upon its maturity. This primarily portrays the extent of calcifications.
Grading system
Grades
Period of gestation
Features
‘0’
<18 weeks
Uniform echogenicity; Smooth chorionic plate
‘I’
18–29 weeks
Occasional parenchymal calcification/hyperechoic areas
‘II’
>30 weeks
Occasional basal calcification/hyperechoic areas; May also have comma-type densities at the chorionic plate
‘III’
>39 weeks
Significant basal calcification; Chorionic plate interrupted by indentations; An early progression to grade III is a matter of concern and is sometimes associated with placental insufficiency
27
 
Third Trimester (29–40 Weeks)
 
Signs and Symptoms
  • Amenorrhea continues
  • As the fetus and uterus grow, the patient will complain of more and more discomfort
  • Abdomen enlarges further
  • There may be physiological edema of the feet
  • Frequency of micturition again increases
  • Fetal movements are more distinct
  • Pigmentation and striae are more dark.
 
Examination
  • Very important in this trimester is to distinguish lie, presentation, position and attitude of the fetus
  • To know the Leopold maneuver
  • To distinguish between physiological and pathological edema
  • Pelvic examination
  • Bishop’s scoring system.
 
‘Lie’
Relationship between the longitudinal axis of the fetus and mother.
Can be:
  • Longitudinal (resulting in either cephalic or breech presentation)
  • Oblique (unstable, will eventually become either longitudinal or transverse)
  • Transverse (resulting in shoulder presentation).
 
‘Presentation’
This refers to the leading anatomical part of the fetus, i.e. the one closest to the pelvic inlet of the birth canal.
The various presentations are:
  1. Cephalic presentation (96.5%)
  2. Breech presentation (3%)
  3. Shoulder presentation (0.5%).
 
‘Presenting Part’
The part which is usually felt first on per vaginal examination.
Depending on the degree of flexion, in a cephalic presentation, the presenting part can be:
  • Vertex—the most common and associated with the fewest complications
  • Sinciput
  • Brow
  • Face
  • Chin.
28
 
‘Attitude’
Relationship of fetal head to spine.
Can be:
  • Flexed (this is the normal situation) → sinciput is higher than the occiput
  • Neutral (‘military’) → deflexed state, when both sinciput and occiput are at the same level
  • Extended.
 
‘Denominator’
It is the bony point on the presenting part which comes in contact with the various quadrants of the maternal pelvis.
Presenting part
Denominator
Vertex
Face
Brow
Breech
Shoulder
Occiput
Mentum
Frontal eminence
Sacrum
Acromion
 
‘Position’
Relationship of presenting part to maternal pelvis. Based on various presentations, the different positions can be as follows:
  • Vertex presentation with longitudinal lie:
    • Left occipitoanterior (LOA)—the occiput is close to the vagina (hence known as vertex presentation). It faces anteriorly (forward with mother standing) and towards left. This is the most common position and lie
    • Right occipitoanterior (ROA)—the occiput faces anteriorly and towards right. Less common than LOA, but not associated withlabor complications
    • Left occipitoposterior (LOP)—the occiput faces posteriorly (behind) and towards left
    • Right occipitoposterior (ROP)—the occiput faces posteriorly and towards right
    • Occipitoanterior—the occiput faces anteriorly (absolutely straight without any turning to any of the sides)
    • Occipitoposterior—the occiput faces posteriorly (absolutely straight without any turning to any of the sides).
  • Breech presentation with longitudinal lie:
    • Left sacrum anterior (LSA)—the buttocks, as against the occiput of the vertex presentation, lie close to the vagina (hence known as breech presentation), anteriorly and towards the left
    • Right sacrum anterior (RSA)—the buttocks face anteriorly and towards the right
    • Left sacrum posterior (LSP)—the buttocks face posteriorly and towards the left
    • Right sacrum posterior (RSP)—the buttocks face posteriorly and towards the right
    • Sacrum anterior (SA)—the buttocks face anteriorly
    • Sacrum posterior (SP)—the buttocks face posteriorly
  • Shoulder presentation with transverse lie has the following different positions, based on the location of the scapula:
    • Left scapula-anterior (LSA)
    • Right scapula-anterior (RSA)
    • Left scapula-posterior (LSP)
    • Right scapula-posterior (RSP)
29
 
Edema
Causes (differential diagnosis):
  1. Physiological
  2. Preeclampsia
  3. Anemia/hypoproteinemia
  4. Cardiac failure
  5. Chronic renal disease
  6. DVT
 
Physiological Edema
Cause: Increased venous pressure of lower extremities by gravid uterus pressing on common iliac veins.
Features:
  1. Slight degree (ankle edema) usually confined to 1 leg (right > left)
  2. Unassociated with increase in BP or proteinuria
  3. Disappears on rest alone
How and where to check?
  • Over medial malleolus and anterior 1/3rd of tibia
  • Press with thumb for 5 seconds
 
Approach to a Patient of Edema
Edema
Localized? → Yes → Venous or lymph obstruction
No
Albumin < 2.5 g/dL → Yes → Severe malnutrition OR Chronic liver disease OR Nephrotic syndrome
No
↑ JVP or ↓ Cardiac output → Yes → Heart failure
No
Azotemia or active urine sediment → Yes → Renal failure
No
Drug induced (steroids, estrogen, vasodilators)Hypothyroidism
30
 
28–30 Weeks
  • Measure blood pressure and weight
  • Check edema (pedal)
  • Check hemoglobin
  • Offer anti-D prophylaxis to all rhesus-negative women
  • Measure symphysis fundal height.
 
32–34 Weeks
  • Measure weight, blood pressure and symphysis fundal height
  • Ultrasound for fetal well-being, liquor, placental localization
  • Urine routine to be done
  • Repeat ICT at 34–36 weeks
  • Some prefer to give anti-D again at 34 weeks (if dual dose regimen was adopted at 28 weeks) (Refer to chapter on Rh-negative pregnancy)
  • Confirm the presenting part by Leopold’s maneuvers.
 
Leopold’s Maneuvers
  • Named after the gynecologist Christian Gerhard Leopold
  • Determines position and presentation of the fetus
  • Difficult to perform on obese women and women who have polyhydramnios
  • The maneuvers consist of four distinct actions
  • The woman is relaxed and adequately positioned
  • Bladder is emptied
  • The woman should lie on her back with her shoulders raised slightly on a pillow and her knees flexed
  • Abdomen uncovered
  • Warm the hands by rubbing prior to palpation.
 
First Maneuver: Fundal Grip
  • While facing the woman, palpate the woman’s upper abdomen with both the hands
  • Determine the size, consistency, shape and mobility of the form that is felt
  • Fetal head is hard, firm, round, and moves independently of the trunk while the buttocks feel softer, are symmetric, and the shoulders and limbs have small bony processes; unlike the head, they move with the trunk.
 
Second Maneuver: Umbilical Grip or Lateral Grip
  • Attempt to determine the location of the fetal back
  • Still facing the woman, palpate the abdomen with gentle—but also deeppressure using the palm of the hands
  • First the right hand remains steady on one side of the abdomen while the left hand explores the right side of the uterus
  • This is then repeated using the opposite side and hands
  • The fetal back will feel firm and smooth while fetal extremities (arms, legs, etc.) should feel like small irregularities and protrusions
  • The fetal back, once determined, should be continuous with the part found at fundus and also to the one in the maternal inlet or lower abdomen.
31
 
Third Maneuver: First Pelvic Grip
  • Face the woman’s feet
  • The fingers of both the hands are moved gently down the sides of the uterus towards the pubis
  • The side, where the resistance to the descent of the fingers towards the pubis is greatest, is where the brow is located
  • If the head of the fetus is well-flexed, it should be on the opposite side from the fetal back
  • If the fetal head is extended and the occiput is felt instead → it is located on the same side as the back.
 
Fourth Maneuver: Pawlick’s Grip (Second Pelvic Grip)
  • In this maneuver, attempt to determine which fetal part is lying above the inlet, or lower abdomen
  • First grasp the lower portion of the abdomen just above the pubic symphysis with the thumb and fingers of the right hand
  • This maneuver should yield the opposite information and validate the findings of the first maneuver
  • If it is the head and is not engaged, it may be gently pushed back and forth.
 
To Summarize
Examination
Determined by
Lie of fetus
Inspection → uterus appears longitudinal
Fundal grip
1st pelvic grip
Presentation
1st pelvic grip
Attitude
1st pelvic grip
Well flexed—sinciput higher than occiput
Deflexed—both sinciput and occiput at the same level
Presenting part
1st pelvic grip
Sinciput on same sides as limbs
Position
Inspection—convex uterine contour
Lateral grip
Auscultation
Engagement
1st pelvic grip—both poles not felt per abdomen
Divergence of examining fingers
If the fingers converge—head is not engaged
 
36–38 Weeks
  • Measure weight and blood pressure
  • Fetal presentation
  • ‘Lightening’—when the baby has dropped down in the pelvis and the diaphragm is relieved of pressure
  • If it is a breech presentation, ECV can be offered after excluding contraindications to it
  • Per vaginal examination for:
    • Adequacy of pelvis
    • Any cervical changes
    • And then mode of delivery is discussed with the patient
  • 32Explain the patient about the labor process in brief
  • The woman is made aware of signs of onset of true labor pains and that she should report if she has the following:
    • Pain in the abdomen which is radiating
    • Intermittent and increasing in frequency, duration and intensity
    • Per vaginal leak or blood-stained discharge
    • Decreased fetal movements
  • If cesarean section is to be done, indication is discussed with the woman and appropriate gestational age for it is to be decided
  • Women should be made aware of the advantages of breastfeeding.
 
Pelvic Assessment
In vertex presentation: Assessment is done at any time beyond 37th week but better at the beginning of labor because due to the softening of tissues, assessment can be done effectively during this time.
Empty bladder
Dorsolithotomy position
Aseptic precautions
Cover the abdomen.
NOTE: Sterilized gloved fingers once taken out should not be reintroduced.
 
Sacral Promontory
  • Attempt should be made to tip the sacral promontory
  • Try to establish the length of the diagonal conjugate
  • Method:
    • Fingers are to follow anterior sacral curvature
    • In normal pelvis, it is difficult to feel sacral promontory (or felt with difficulty)
    • To reach it, elbow and wrist are to be depressed sufficiently and fingers are mobilized in an upward direction
    • Point at which bone recedes from fingers is sacral promontory
    • Fingers are then mobilized under symphysis pubis and a marking is placed over the gloved index finger by the index finger of the left hand
    • Internal fingers are removed
    • Distance between marking and tip of middle finger gives measurement of diagonal conjugate
    • Practically: If middle finger fails to reach promontory or touches it with difficulty→ conjugate is adequate for average size head to pass through
  • If it is easily tipped, it should alert one to the possibility of a contracted pelvis.
 
Curvature of the Sacral Curve
  • It is next assessed to see if it is flat or well-curved
  • A well-curved sacrum allows for internal rotation of the fetal head.
 
Pelvic Side Walls
  • Assessed next to see if they are parallel or convergent
  • Normally not easily palpable.
33
 
Ischial Spines
  • These are palpated to see if they are prominent and sticking in (that is, decreasing the space in midpelvis)
  • Normally these are everted.
 
Sacrosciatic Notch
  • Sufficiently wide to place 2 fingers over sacrospinous ligament covering the notch
  • Gives information of the capacity of posterior segment and side walls of the lower pelvis.
 
Posterior Surface of Symphysis Pubis
  • Smooth rounded curve
  • Angulation/beaking → abnormal.
 
Pubic Arch
  • Normally rounded
  • Should accommodate palmar aspect of 2 fingers
  • Configuration more important than pubic angle.
 
Subpubic Angle
  • Before the fingers are removed from the vagina, the subpubic angle is assessed to see if it is acute or obtuse.
 
Now take out your fingers
 
Intertuberous Diameter
  • Having removed the fingers, the intertuberous diameter is assessed to see if it accommodates more than four knuckles → if it does, it is adequate.
 
Conclusion
The most suitable pelvis for vaginal delivery is that of a gynecoid pelvis that has adequate dimensions.
Features of a gynecoid pelvis include:
  • A wide diagonal conjugate
  • A well-curved sacrum
  • Parallel side walls
  • Ischial spines that are not prominent
  • A wide subpubic angle; and lastly
  • A wide intertuberous diameter.
 
40–41 Weeks
  • Measure blood pressure
  • Height of uterus will be at 32 weeks due to engagement of fetal head; therefore, look at the flanks → if full, the duration of pregnancy is 40 weeks
  • 34Membrane sweeping is done followed by induction of labor, if labor pains do not start on their own
  • Bishop score is calculated
  • Discuss about the risks associated with prolonged pregnancy (decreased liquor, meconium aspiration, etc.).
 
Modified Bishop Score or Prelabor Scoring or Preinduction Score
  • Bishop score is a prelabor scoring system to assist in predicting whether induction of labor will be required
  • Components included to calculate the score are (original Bishop’s score):
    • Cervical dilation
    • Cervical effacement
    • Cervical consistency
    • Cervical position
    • Fetal station
  • According to the Modified Bishop’s preinduction cervical scoring system, effacement has been replaced by cervical length in cm
Score
0
1
2
3
Dilatation
Closed
1–2
3–4
5
Length
>4
3–4
1–2
0
Consistency
Firm
Medium
Soft
Position
Posterior
Midline
Anterior
Station
–3
–2
–1/0
+1, +2
 
Interpretation
  • Total score = 13
  • Favorable score = 6–13
  • Unfavorable score = 0–5
  • A score of ≤ 5 suggests that labor is unlikely to start without induction
  • A score of ≥ 9 indicates that labor will most likely commence spontaneously.
Another modification for the Bishop’s score is the ‘modifiers’. Points are added or subtracted according to the special circumstances as follows:
One point is added for:
  • Existence of preeclampsia
  • Every previous vaginal delivery.
One point is subtracted for:
  • Postdated pregnancy
  • Nulliparity (no previous vaginal deliveries)
  • PPROM (Preterm premature rupture of membranes).
35
 
ULTRASOUND
Period of gestation
Ultrasound features
Week 29–34
  • Wrinkled skin is becoming smoother now
  • In boys, the testicles have moved down to the groin by week 30
  • Eyes open completely
  • Toenails and fingernails are completely formed
  • Eyes open when awake and close when sleeping
  • Excellent chance of survival outside the womb
 
Calculation of Gestational Age
 
Menstruation—Labor Interval (Naegele’s rule)
Expected date of delivery (EDD)
  • 1st day of the last menstrual period + 7 days + 9 calendar months
    OR
  • 1st day of LMP + 7 days – 3 calendar months + 1 year
    OR
  • 1st day of LMP + 280 days (40 weeks).
 
A General History in Pregnancy
 
Chief complaints of the patient
 
 
Past Obstetric History (Gravida, Parity, Abortions, Ectopic, Twins, Death)
 
Importance
  1. Married life (years). The woman may have conceived many years after her marriage
  2. Consanguinity
  3. Whether ANCs were taken in each previous pregnancy
  4. Complications in previous antenatal periods (preeclampsia, preterm labor, gestational diabetes, antepartum hemorrhage, etc.)
  5. Grand multiparity
  6. Miscarriages (to rule out bad obstetric history and its causes, which are different for each trimester)
  7. Ectopic pregnancy (whether managed medically or surgically; which surgery was done; was the tube saved; any blood transfusions were done; if medically treated, any reaction to the drug used, when was the treatment ended)
  8. Any h/o molar pregnancy (ask patient to get previous records in the next visit; what treatment was given; histopathology report after D and C; was chemotherapy given and for how long)
  9. Any h/o twin gestation (nonidentical twins tend to recur)
  10. Any perinatal deaths [at what period of gestation, cause, how was it suspected or was it an incidental finding, delivery by induction or spontaneous, how was the appearance of the baby 36(macerated, peeling of skin, skin color, any gross congenital anomalies seen, did the baby cry after birth, as the women sometimes are not able to distinguish intrauterine death or death immediately after birth); any histopathology sample of the baby was sent; if yes, ask for reports]
  11. Mode of each delivery—vaginal or cesarean section; prolonged labor; birth weight of each baby; home or institutional delivery; gestational age at delivery; instrumental delivery; any complication after vaginal deliveries
  12. If delivery was by cesarean section—cause, type of incision, any postoperative complications, history of blood transfusion
  13. Was Anti-D taken in cases of Rh-negative pregnancy
  14. Whether any baby was kept in NICU, why and for how long
  15. Intervals between pregnancies
  16. Whether all babies are alive and healthy
  17. Whether breastfeeding done after each delivery and for how long.
 
Present Pregnancy
  1. Type of conception (spontaneous or after-infertility treatment)
  2. Any history of fever with or without rash, vaginal bleeding, burning micturition, etc.
  3. Following minor symptoms should be enquired:
    • Nausea and vomiting
    • Heart burn
    • Constipation
    • Edema of the ankles and hands.
 
Menstrual History
 
Importance
  1. Last menstrual period
  2. Periods were regular or irregular
  3. Whether the patient had any spotting after her last periods (may be implantation bleed)
  4. Any history of oral or injectable contraception. These patients must have menstruated spontaneously after stopping contraception, otherwise the date of the last period should not be used to measure the duration of pregnancy.
 
Past Personal History/History of Medications, Surgeries, Allergies(Some medical conditions may become worse during pregnancy)
  1. Hypertension
  2. Diabetes mellitus
  3. Rheumatic or other heart diseases
  4. Epilepsy
  5. Asthma
  6. Tuberculosis
  7. Psychiatric illness
  8. Any other major illness or blood transfusions in the past
  9. Any past medication can be a pointer of a specific illness. Certain drugs can be teratogenic to the fetus. So, they need to be changed or stopped at all.
  10. Allergies to drugs need to be mentioned clearly on antenatal card
  11. Any previous (major or minor) surgeries need to be enquired.
37
 
Family History
Parents and first-degree relatives with a condition such as diabetes, multiple pregnancy, bleeding tendencies or mental retardation have an increased risk of these conditions in the patient and the fetus. Some birth defects are inherited.
Of utmost importance are the risk factors for gestational diabetes:
  1. Body mass index above 30 kg/m2
  2. Previous macrosomic baby weighing ≥ 4.5 kg
  3. Previous gestational diabetes
  4. Family history of diabetes (first-degree relative with diabetes)
  5. Family origin with a high prevalence of diabetes:
    • South Asian (specifically women whose country of family origin is India, Pakistan or Bangladesh), black Caribbean Middle Eastern (specifically women whose country of family origin is Saudi Arabia, United Arab Emirates, Iraq, Jordan, Syria, Oman, Qatar, Kuwait, Lebanon or Egypt).
 
Social Circumstances of the Patient
  1. Unemployment, poor housing (kutcha or pucca house, electricity) and overcrowding increase the risk of tuberculosis, malnutrition and intrauterine growth restriction. Patients living in poor social conditions need special support and help. Family income needs to be calculated according to Kuppuswamy scale
  2. Daily calories of the patient need to be counted
  3. Smoking/alcohol/tobacco consumption is enquired.
 
Kuppuswamy Scale (2012)
Kuppuswamy’s socioeconomic status scale has been in use as an important aid to measure socioeconomic status of families in urban communities. The original version was given in 1976, which was later updated in 2003 by Mishra and Singh and again in 2007 by Kumar and colleagues. As changes in inflation rates change the monetary values of the monthly income range scores, Kuppuswamy scale has been again updated in 2012.
It includes education, occupation and family income per month
(A) Education:
  1. Profession or honours
  2. Graduate or postgraduate
  3. Intermediate or post-high-school diploma
  4. High-school certificate
  5. Middle-school certificate
  6. Primary-school certificate
  7. Illiterate
Score
  • 7
  • 6
  • 5
  • 4
  • 3
  • 2
  • 1
(B) Occupation:
  1. Profession
  2. Semiprofession
  3. Clerical, shop-owner, farmer
  4. Skilled worker
  5. Semiskilled worker
  6. Unskilled worker
  7. Unemployed
Score
  • 10
  • 6
  • 5
  • 4
  • 3
  • 2
  • 1
38
(C) Family income per month (2012):
  1. = 30375
  2. 15188-30374
  3. 11362-15187
  4. 7594-11361
  5. 4556-7593
  6. 1521-4555
  7. =1520
Score
  • 12
  • 10
  • 6
  • 4
  • 3
  • 2
  • 1
Total score
  1. 26-29
  2. 16-25 Middle
  3. 11-15
  4. 5-10 Lower
  5. <5
Socioeconomic stat
  • Upper (I)
  • Upper middle (II)
  • Lower middle (III)
  • Upper lower (IV)
  • Lower (V)
 
Physical Examination
 
General Appearance
  1. Consciousness, orientation to time, place and person, occupation (to exclude occupational hazards or occupation as a cause of stress)
  2. Built, sleep, nutrition, height, weight, BMI
  3. Calories need to be calculated and proper diet needs to be explained
  4. Face
    Chloasma uterinum ( gravidarum)
    • Brownish pigmentation of the bridge of the nose and the maxillae, simulating a butterfly appearance
    • Occasionally, the pigmentation is more generalized, affecting the forehead and the cheeks
    Acromegalic features
    • More manifest in the 2nd half of pregnancy
    • Ascribed to the possible increase of the growth hormone of the anterior pituitary or placenta.
 
Systemic Examination
  1. Pallor, icterus, cyanosis, clubbing, lymphadenopathy (neck, axillae, inguinalareas), edema (feet, hands, face)
  2. Thyroid
    • A visibly enlarged thyroid gland, a single palpable nodule or a nodular goiter is abnormal and needs further investigation
    • A slightly, diffusely enlarged thyroid gland is normal in pregnancy
  3. Breasts
    • Enlargement, warmth, tenderness—in which quadrant, is generalized or isolated
      • Early pregnancy: mostly manifest in the upper and outer quadrants
      • Late pregnancy: becomes more generalized and felt all over the breasts
    • Dilated veins under the skin
    • Nipple enlargement, pigmentation, more erectile or not
    • Discharge from nipples (color, consistency, amount)
    • Inverted or flat nipples
    • 39Areola—size and pigmentation
    • Montgomery’s follicles—‘glandular tubercles’
    • Any breast lump
  4. Spine (lordosis, kyphosis, scoliosis)
  5. Respiratory system
    • Breath sounds, bilateral air entry, respiratory rate, dyspnea
  6. Cardiovascular system
    • BP, PR
    • Functional murmurs (a soft, midsystolic, nonradiating, ejection murmur heard best over the mitral or aortic areas) are common in pregnancy.
    Blood Pressure Recording in Pregnancy—Ideal Method
    • First one should be familiar with the 5 phases of Korotkoff sounds
    • Phase I: 1st appearance of sounds marking systolic pressure
    • Phases II and III: Increasing loud sounds
    • Phase IV: Muffling of sounds
    • Phase V: Disappearance of sounds.
    Position
    • Rest—5 minutes
    • Sitting with feet supported on flat surface (avoid supine position)
    • Remove every tight clothing from the arm
    • Arm well supported at the level of the heart (different arm positions can alter the BP significantly)
    • Measure BP on both the arms at the first visit (this excludes rare vascular disorders)
    • BP of the arm giving higher reading is to be taken
    • In labor → left recumbent position.
    Cuff
    • Length—1.5 times the circumference of the arm
    • Wide enough to cover at least 2/3rd of the upper arm
    • Arm circumference >33 cm → use larger cuff
    • Smaller cuff size will overestimate BP
    • Larger cuff will underestimate BP
    • Lower edge of the cuff should be 2–3 cm above the point of brachial artery pulsation (easy access to antecubital fossa)
    • Application should be firm.
    Measurement apparatus
    • Mercury sphygmomanometer is still considered the best for measuring BP (especially in pre-eclamptic patients)
    • Automated devices may underestimate BP by 10–15 mm Hg.
    Measurement
    • Do not kink or twist the tube on the cuff
    • Inflated and deflated smoothly
    • Korotkoff V is taken for diastolic BP
    • Korotkoff IV only when sounds are audible as level approaches ‘0’ mm Hg (due to hyperdynamic circulation of pregnancy).
  7. 40Abdomen (always warm your hands before abdominal palpation)
    • Pigmentation “linea nigra”
    • Striae gravidarum (color, site)
    • Any scar (any previous surgery), its site (horizontal, vertical) and present condition
    • Fetal movements
    • Fetal parts
    • External ballottement
    • Contractions
    • Fundal height
    • Symphysis fundal height (with measuring tape)
    • Tenderness, any mass palpable, organomegaly
    • Leopold maneuvers
    • Fetal heart sound.
  8. Both external and internal genitalia
    • Any ulcers, purulent or excessive discharge, enlarged inguinal lymph nodes should be looked for
    • Suspicious looking cervix (cervical smear must be taken) or any growth on the cervix
    • Bimanual examination (for size of uterus, if not palpable per abdomen), condition of the internal os
    • Any tenderness in the fornices
    • Pelvic assessment (if appropriate at that gestational age).
In the end, calculate period of gestation and write the provisional diagnosis
 
To Summarize
Calculation of period of gestation is by:
  1. Last normal menstrual period (if dates are sure)
  2. Size of the uterus on bimanual (up to 12 weeks) examination
  3. Abdominal examination from 12–22 weeks, when fundal height is still below the umbilicus, is considered very accurate
  4. SFH between 24 and 36 weeks
  5. The size of the fetus (rule out IUGR/SGA or large for date fetus)
  6. Ultrasound measurements:
    • If the ultrasound examination is done at ≤ 14 weeks, the error in determining the gestational age is only one week
    • If patient is >24 weeks pregnant, ultrasound cannot be used to determine the gestational age
    • If still not clear, look for serial growth after 3 weeks.
Uterus bigger than dates suggests:
  • Error in calculating dates or wrong dates
  • Multiple pregnancy
  • Polyhydramnios
  • Large for the gestational age
  • Diabetes mellitus
  • Complete molar pregnancy
  • Hydrops
  • Any mass (fibroid, ovarian tumour, etc.) with pregnancy
  • Sometimes fetus in breech presentation looks bigger.
41 Uterus smaller than dates suggests:
  • Error in calculating dates or wrong dates
  • Intrauterine growth restriction
  • Oligohydramnios
  • Small for gestational age
  • Transverse lie
  • Fetal descent into the pelvis
  • Intrauterine death
  • Rupture of membranes.
 
Few Other Queries are Always in a Pregnant Woman’s Mind
 
Lifestyle Considerations
Working during pregnancy is safe.
 
Food-acquired Infections
Pregnant women should be informed of primary prevention measures to avoid:
Toxoplasmosis infection
  • Washing hands before handling food
  • Thoroughly washing all fruits and vegetables, including ready prepared salads, before eating
  • Thoroughly cooking raw meats (> 67°C/153°F)
  • Wearing gloves and thoroughly washing hands after handling soil and gardening
  • Avoiding cat feces in cat litter or in soil
  • Freezing meat to at least −20°C/−4°F also kills T. gondii cysts
  • Clean surfaces and utensils that have been in contact with raw meat
  • Do not consume raw eggs or raw milk
  • Do not drink water potentially contaminated with oocysts
  • Be aware that:
    • The process of curing, smoking or drying meat does not necessarily result in a product free of parasite cysts
    • Refrigeration does not destroy the parasite (still viable after 68 days at +4°C)
    • Microwave oven cooking does not destroy parasites.
Infection by listeriosis
  • Drinking only pasteurized or UHT milk
  • Not eating ripened soft cheese (there is no risk with hard cheese, such as Cheddar, or cottage cheese and processed cheese)
  • Not eating uncooked or undercooked ready-prepared meals.
Salmonella infection
  • Avoiding raw or partially cooked eggs or food that may contain them (such as mayonnaise)
  • Avoiding raw or partially cooked meat, especially poultry.
 
Medicines
  • Few medicines have been established as safe to use in pregnancy
  • To be taken under supervision.
42
 
Exercise in Pregnancy
  • Beginning or continuing a moderate course of exercise during pregnancy is not associated with adverse outcomes
  • Contact sports, high-impact sports and vigorous racquet sports that may involve the risk of abdominal trauma, falls or excessive joint stress, and scuba diving, which may result in fetal birth defects and fetal decompression disease are to be avoided in pregnancy.
 
Sexual Intercourse in Pregnancy
  • Sexual intercourse in pregnancy is not known to be associated with any adverse outcomes.
 
Alcohol Consumption in Pregnancy
  • Pregnant women and women planning a pregnancy should be adviced to avoid drinking alcohol in the first 3 months of pregnancy if possible because it may be associated with an increased risk of miscarriage
  • If women choose to drink alcohol during pregnancy, they should be adviced to drink no more than one small (125 mL) glass of wine
  • Although there is uncertainty regarding a safe level of alcohol consumption in pregnancy, at this low level, there is no evidence of harm to the unborn baby.
 
Smoking in Pregnancy
  • Ask about active or even passive smoking (in case the husband is a smoker)
  • Risks associated—low birth weight and preterm birth
  • The benefits of quitting at any stage should be emphasized.
 
Air Travel during Pregnancy
  • Pregnant women should be informed that long-haul air travel is associated with an increased risk of venous thrombosis, although the fact that whether or not there is additional risk during pregnancy is unclear
  • Wearing correctly fitted compression stockings is effective at reducing the risk.
 
Car Travel during Pregnancy
  • Correct use of seat belts (that is, three-point seat belts ‘above and below the bump, not over it’) should be explained.
 
Travelling Abroad during Pregnancy
  • Pregnant women should be informed that if they are planning to travel abroad, they should discuss about considerations such as flying conditions, vaccinations and travel insurance.
 
Management of Common Symptoms of Pregnancy
 
Nausea and Vomiting in Early Pregnancy
  • Women should be informed that most cases of nausea and vomiting in pregnancy will resolve spontaneously within 16 to 20 weeks and that nausea and vomiting are not usually associated with a poor pregnancy outcome
  • 43The following interventions appear to be effective in reducing symptoms:
    • Nonpharmacological: ginger, P6 (wrist) acupressure
    • Pharmacological: antihistamines.
 
Heartburn
  • Lifestyle and diet modification
  • Antacids may be offered to women whose heartburn remains troublesome despite lifestyle and diet modification.
 
Constipation
  • Diet modification, such as bran or wheat fiber supplementation
  • Increase water intake.
 
Hemorrhoids
  • Diet modification
  • If clinical symptoms remain troublesome, standard hemorrhoid creams should be considered.
 
Varicose Veins
  • Varicose veins are a common symptom of pregnancy that will not cause harm
  • Compression stockings can improve the symptoms but will not prevent varicose veins from emerging.
 
Leg Cramps
  • Administration of adequate calcium and vitamin D3
  • Gentle massage of the legs
  • Local application of topical analgesics.
 
Vaginal Discharge
  • Increase in vaginal discharge is a common physiological change that occurs during pregnancy
  • If it is associated with itch, soreness, offensive smell or pain on passing urine, there may be an infective cause and so investigation should be considered
  • A 1-week course of a topical imidazole is an effective treatment and should be considered for vaginal candidiasis infections in pregnant women
  • The effectiveness and safety of oral treatments for vaginal candidiasis in pregnancy are uncertain and these treatments should not be offered.
 
Backache
  • Women should be informed that exercising in water, massage therapy and group or individual back care classes might help to ease backache during pregnancy.
 
Breast Care
  • Maintain cleanliness
  • Massage the breasts
  • Try to express the discharge (colostrum).
44
 
Prediction, Detection and Initial Management of Mental Disorders
 
 
Topics to be discussed during health education sessions
  1. Healthy eating
  2. Danger symptoms and signs
  3. Dangerous habits, e.g. smoking or drinking alcohol
  4. Description of the onset and process of labor must be included, especially when the patient is a primigravida
  5. HIV counseling of both the partners
  6. Breastfeeding
  7. Care of the newborn infant
  8. Family planning.
 
Preconception History and Counseling
 
 
HISTORY
 
Genetic History
 
Risk Factors
  1. Risk factors for numerical chromosomal abnormalities and new mutations
    • Maternal age
    • Paternal age (≥ 40 years, r/o child having new gene mutations)
    • Radiation/chemicals/drugs
  2. Risk factors for inherited mutations
    • Presence of such an illness in either parent, in his or her family or in a previous child
    • Couple’s ethnic background:
      • Cystic fibrosis in Europe, the Mediterranean region and Middle East
      • Sickle cell anemia and thalassemia (where prevalence of malaria is ↑)
      • Tay-Sachs disease and several other rare disorders in Ashkenazi Jewish background
      • Neural tube defects
    • Consanguinity—risk of autosomal recessive disorders increases.
 
Family History
Construct three-generation pedigree, which includes the following:
 
Genetic Disorders in the Family
  • Muscular dystrophy
  • Hemophilia
  • Cystic fibrosis
  • Fragile X syndrome
  • Congenital heart disease
  • Phenyl ketonuria
  • Dwarfism
  • Sickle cell anemia
  • Tay-Sachs disease.
45
 
Multifactorial Congenital Malformations
  • Spina bifida
  • Anencephaly
  • Cleft palate and cleft lip
  • Hypospadias
  • Congenital heart disease.
 
Familial Diseases with a Major Genetic Component
  • Developmental disability
  • Premature atherosclerosis
  • Diabetes mellitus
  • Psychosis
  • Epileptic disorders
  • Hypertension
  • Rheumatoid arthritis
  • Deafness
  • Severe refractive disorders of the eye.
 
Age
  • Women < 20 or > 35 years carry increased risks.
 
Health History
 
Chronic Conditions
  • Diabetes mellitus
  • Anemia
  • Thyroid disorders
  • Gynecological disorders
  • Asthma
  • STDs
  • Heart disease
  • Hypertension
  • Deep venous thrombosis
  • Kidney disease
  • SLE
  • Epilepsy
  • Hemoglobinopathies
  • Cancer
  • Seizure disorders
  • Tuberculosis
  • Rheumatoid arthritis
  • Mental health/psychiatric disorders.
 
Infectious Conditions
  • Rubella or varicella susceptible—offer vaccination if not vaccinated
  • Hepatitis B and C—routine preconception testing is not currently recommended
  • 46Routine serologic testing for toxoplasmosis is not recommended
  • Evaluate (woman and her partner) for sexually transmitted disease (e.g. Chlamydia, HIV, gonorrhea, syphilis)
  • Periodontal screening
  • Nonpregnant women immunized with a live or live-attenuated vaccine should be counseled to delay pregnancy by at least four weeks.
 
Reproductive History
  • Menstrual history (regularity, duration and amount of flow, length of cycle, clots, dysmenorrhea)
  • Contraceptive
  • Sexual history
  • Infertility
  • Abnormal Pap smear
  • In utero exposure to diethylstilbestrol
  • Past obstetric history
    • Early/late miscarriages/stillbirths
    • Number of pregnancies and live issues
    • Mode of previous deliveries
    • Length/course of labor
    • Complications (preterm labor or delivery, gestational diabetes mellitus, hypertension in pregnancy, postpartum depression).
 
Lifestyle Assessment
  • BMI
  • Nutrition
  • Physical activity
  • Sufficient sleep
  • Minimum stress
  • Prescription and over-the-counter drug use
  • Other substance abuse
  • Environmental exposures (current and past).
 
COUNSELING
  1. Ideal BMI—19.6–26.0 kg/mt²
  2. Laboratory testing:
    • CBC
    • Urinalysis
    • ABO Rh
    • VDRL
    • HIV
    • HbsAg
    • Rubella antibody titer
  3. 47Folic acid or folate (vitamin B9)
    The recommended strategy(ies) for primary prevention or to decrease the incidence of fetal congenital anomalies include(s) various options:
    Option A:
    Patients with no personal health risks, planned pregnancy and good compliance require:
    • Folate-rich foods—fortified grains, spinach, lentils, chickpeas, asparagus, broccoli, peas, Brussels sprouts, corn and oranges
    • A multivitamin with folic acid (0.4–1.0 mg) × 2–3 months before conception and throughout pregnancy and postpartum period (4–6 weeks and as long as breastfeeding continues).
    Option B:
    Patients with health risks (previous child with neural tube defects, epilepsy, Type I DM, use of folate antagonists, obesity with BMI >35 kg/m2, family history of neural tube defects, belonging to a high-risk ethnic group, e.g. Sikhs) require:
    • Increased dietary intake of folate-rich foods
    • A multivitamin with 5 mg folic acid, beginning at least three months before conception and continuing until 10 to 12 weeks postconception. From 12 weeks postconception and continuing throughout pregnancy and the postpartum period (4–6 weeks or as long as breastfeeding continues), supplementation should consist of a multivitamin with folic acid (0.4–1.0 mg).
  4. Vitamin D intake of minimum 5 μg/day for nonpregnant women with limited exposure to sunlight (i.e. those whose hands and face are exposed to the open air for < 15 minutes/day) and 10 μg/day for pregnant women
  5. Avoid exposure to cat feces, raw/undercooked meats and unpasteurized milk
  6. Smoking and alcohol cessation
  7. Consumption of vitamin A to < 3000 μg/day
  8. Polytherapy changed to monotherapy in case of epilepsy with prior consultation with a neurologist
  9. Adequate glycemic control in a patient of pregestational diabetes
  10. Consultation with cardiologist if having cardiac disease
  11. ACE inhibitors should be changed to a different drug.
SUGGESTED READING
  1. Antenatal care: NICE clinical guideline; 62. June 2010.
  1. BCPHP obstetric guideline 19, Maternity care pathway. Feb 2010.
  1. Belizan J, Villar J, et al. Diagnosis of intrauterine growth retardation by a simple clinical method: Measurement of uterine height. Am J Obstet Gynecol. 1978; 131: 6: 643-64.
  1. Kuppuswamy’s socioeconomic scale: Updating income ranges for the year 2012. Indian Journal of Public Health. January-March, 2012; Volume 56: Issue 1.
  1. Measuring fundal height with a tape measure: Clinical Guidelines. OGCCU King Edward Memorial Hospital, Perth, Western Australia. September 2012.