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Chapter-03 Anatomy of Female Pelvis

BOOK TITLE: Essentials of Obstetrics

Author
1. Arulkumaran Sabaratnam
2. Mukherjee Soma
ISBN
9788184489095
DOI
10.5005/jp/books/11242_3
Edition
2/e
Publishing Year
2011
Pages
8
Author Affiliations
1. St. George’s Hospital Medical School London, St. George’s Hospital Medical School, London, St George’s Hospital Medical School, London, United Kingdom, St George’s Hospital Medical School, London, United Kingdom, e-mail: sarulkum@sghms.ac.uk, St George s University of London, London, UK, St George’s Hospital Medical School Cranmer Terrace, London SW17 0RE, United Kingdom, St George’s University of London, Cranmer Terrace, London, United Kingdom, FIGO; University of Nicosia, Nicosia, Cyprus
2. St. George’s University of London, London, UK, St George’s University of London, London, United Kingdom
Chapter keywords

Abstract

There are four basic types of pelvis: Gynecoid, android, anthropoid and platypelloid. Of these four types, the gynecoid type of pelvis is most suited for normal vaginal delivery. The normal diameters at different planes of pelvis are as follows: The brim: Anteroposterior diameter = 11.5 cm; transverse diameter = 13 cm; oblique diameter = 12 cm. The midpelvis: All diameters = 12 cm. Outlet: Anterioposterior diameter = 12 cm; transverse diameter = 10.5 cm. The pelvic floor muscles play an important role in supporting the pelvic viscera. The muscles of pelvic floor are levator ani and the coccygeus and their covering fascia. The pelvic vessels comprise of the ovarian and the uterine vessels. The uterine arteries are the main branches of internal iliac artery. The ovarian arteries arise from the aorta just below the origin of the renal arteries. The pelvic nerves comprises of the somatic nerves (lumbar and sacral plexus) as well as autonomic nerves (sympathetic and parasympathetic nervous system).

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