pelvic outlet, the space surrounded by the bones of the lower part of the true pelvis. In men the shape of the pelvic outlet is narrower than that in women, but this is of no clinical significance. In women the shape and size of the pelvis vary and are of importance in childbirth. The shapes are classified by the length of the diameters as compared with each other and by the thickness of the bones. The diameters of the outlet are the anteroposterior, from the symphysis pubis to the coccyx, and the intertuberous, laterally from one to the other ischial tuberosity. See also pelvic classification.
