About Video

This video shows and describes the maternal pelvis. The normal gynecoid pelvis helps in forming the boney canal through which the fetus passes during the normal vaginal mechanism. It is formed posteriorly by sacrum, laterally by coccyx and anteriorly by a pair of innominate bone. Each of the innominate bone is composed of ilium, ischium, and pubis. These bones are connected at four joints i.e. two sacroiliac joints, one pubic symphysis and one sacrococcygeal joint. This video covers normal anatomical position of the pelvis, pelvic brim which divides pelvis into false and true pelvis, pelvic inlet, parts of true pelvis i.e. brim, cavity and outlet, plane of the pelvic inlet, and diameters of pelvic inlet which are anteroposterior, oblique and transverse. The measurement of all diameters is an approximate estimate and slight variations amongst various women are possible. This video also demonstrates the clinical measurement of diagonal conjugate, only which is accessed during late pregnancy or at the time of labor. Pelvic cavity, diameters of pelvic cavity, anatomical pelvic outlet, planes of anatomical outlet, diameters of pelvic outlet, entry of fetal head into the maternal pelvis, rotation of fetal head as it moves down towards the outlet, pelvic axis, and classification of pelvis shapes by Caldwell-Molloy system are also discussed in this video.