Figure 1.

A: Upper conjugate defined as distance from the innermost aspect of the top of the symphysis pubis to the sacral promontory.

B: Height of prostate defined as orthogonal distance from top of symphysis pubis to base of prostate.

C: Depth of prostate defined as orthogonal distance from top of symphysis pubis to apex of prostate.

D: Symphysis angle: defined as angle between the long axis of the symphysis pubis and the horizontal.

E: Lower conjugate defined as distance from lower inner symphysis pubis to sacrococcygeal junction.

F: Bony femoral width defined as bony width of the pelvis at the mid-femoral head level.

G: Interspinous distance defined as distance between the tips of the ischial spines.

H: Width of prostate at the same level as soft tissue width.

I: Soft tissue width defined as narrowest distance between the levator muscles.

J: Demonstration of the mid-pelvic area (MPA).