6. The pelvic outlet : A diamond-shaped area, best appreciated when viewed from below. The boundaries of the pelvic outlet are: the pubic symphysis , right and left rami of the pubic arch , the ischial tuberosities , the sacrotuberous ligaments and the tip of the coccyx .
7. In the living person (or the intact cadaver) there are 2 important ligaments which help to stabilize the bony pelvis: The sacrospinous ligament and the sacrotuberous ligament.