A structural abnormality that occurs in about 20% of women. Deviations from the normal gynecoid configuration include a long, oval, narrow inlet and narrow sacrum, straight sidewalls, and a wide sacrosciatic notch. The shape increases the potential for fetal posterior positions during childbearing.
A female pelvis that is elongated, slender, and oval, similar to that of a large ape. This shape can pose challenges during childbirth.