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Pelvimetry is the measurement of the female pelvis. [1] It can theoretically identify cephalo-pelvic disproportion, which is when the capacity of the pelvis is inadequate to allow the fetus to negotiate the birth canal. However, clinical evidence indicate that all pregnant women should be allowed a trial of labor regardless of pelvimetry results.
[7] [8] This part of the book contains Brigitte Jordan's essay ("Authoritative Knowledge and Its Construction") along with context for the reader about the other essays in the book. [1] [6] [11] Brigitte Jordan elaborates on the theme of authoritative knowledge in her book Birth in Four Cultures: A Cross cultural Investigation of Childbirth in ...
The same human pelvis, front imaged by X-ray (top), magnetic resonance imaging (middle), and 3-dimensional computed tomography (bottom). The pelvis (pl.: pelves or pelvises) is the lower part of an anatomical trunk, [1] between the abdomen and the thighs (sometimes also called pelvic region), together with its embedded skeleton [2] (sometimes also called bony pelvis or pelvic skeleton).
[2] [3] In their edited collection, Childbirth and Authoritative Knowledge: Cross-Cultural Perspectives, Robbie E. Davis-Floyd and Carolyn F. Sargent praised the book for focusing "anthropological attention on childbirth as a subject worthy of in-depth ethnographic fieldwork and cross-cultural comparison, and that inspired many others to enter ...
The shape of the posterior muscular and adipose tissues seems to correspond with the general pelvic morphology. The classification is as follows the gynecoid pelvis corresponds to a round buttocks shape, the platypelloid pelvis to a triangle shape, the anthropoid pelvis to a square shape and the android pelvis to a trapezoidal gluteus region. [8]
Since the pelvis and opening of birth canal face backwards, humans have difficulty giving birth themselves because they cannot guide the baby out of the canal. Non-human primates seek seclusion when giving birth because they do not need any help due to the pelvis and opening being more forward. [ 11 ]
The adoption of the non-lithotomy positions is also promoted by the natural childbirth movement. Being upright during labour and birth can increase the available space within the pelvis by 28–30% giving more room to the baby for rotation and descent.
Extant primates exhibit a broad range of variation in sexual size dimorphism (SSD), or sexual divergence in body size. [4] It ranges from species such as gibbons and strepsirrhines (including Madagascar's lemurs) in which males and females have almost the same body sizes to species such as chimpanzees and bonobos in which males' body sizes are larger than females' body sizes.