Fig. 31-1. Female pelvis. A, View from above, showing inlet and anteroposterior (conjugate) and transverse diameters and surrounded by drawings of the four main types of female pelves. H, View from below, showing outlet and anteroposterior (conjugate) and transverse diameters. C, The pelvic cavity with the left hip bone removed. The anterior superior iliac spines and the pubic tubercles are in the same coronal plane (CP). The linea terminalis comprises the (1) promontory, (2) ala of the sacrum, (3) medial border of the ilium (arcuate line), (4) pectineal line, and (5) pubic crest. (After Smout and Jacoby.) Click for high resolution image.