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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.
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).
Baudelocque is credited for correcting errors regarding childbirth and wrote a popular book on midwifery. He refined André Levret's (1703–1780) "pelvic forceps" and constructed a pelvimeter for use in obstetrics. His pelvimeter were anthropometric calipers used to measure external pelvic dimensions.
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]
The lesser pelvis (or "true pelvis") is the space enclosed by the pelvic girdle and below the pelvic brim: between the pelvic inlet and the pelvic floor. This cavity is a short, curved canal, deeper on its posterior than on its anterior wall. [1]
The Rubin's II maneuver, usually performed after all other exterior maneuvers are exhausted (including McRoberts' and Gaskin's) is performed by inserting one hand vaginally behind the posterior aspect of anterior shoulder of the baby and rotating the shoulder towards the chest of the baby, shifting it from the anterior-posterior pelvic diameter ...
In addition to bipedal locomotion, the reduced strength of the pelvic floor due to a wider maternal pelvis also leads to fitness detriments in the mother pressuring the birth canal to remain relatively narrow. [3] [4] This idea was widely accepted when first published in 1960, but has since been criticized by other scientists. [5]
During childbirth, women are more likely to develop vaginal introital laxity, eventually leading to the weakening of pelvic floor muscles and may develop urinary symptoms such as OAB. [ 7 ] Vaginal introital laxity may also weaken the support structures around the urethra , which is the tube that helps carry urine outside of the body from the ...