1 — Sacrotuberous ligament; 2 — Ischial spine; 3 — Sacrospinous ligament; 4 — Anterior sacro-iliac ligament; 5 — Anterior sacral foramina; 6 — Posterior sacro-iliac ligament; 7 — Posterior superior iliac spine; 8 — Sacrum [sacral vertebrae SI-SV]; 9 — Sacral canal; 10 — Iliac tuberosity; 11 — Interosseous sacro-iliac ligament; 12 — Sacral tuberosity; 13 — Sacro-iliac joint; 14 — Ilium; 15 — Acetabulum; 16 — Ischial spine; 17 — Anterior sacrococcygeal ligament; 18 — Pubic symphysis; 19 — Coccyx [coccygeal vertebrae CoI-CoIV]
