Symphysiotomy is a surgical procedure that divides the symphysis pubis bone to widen the pelvis during childbirth. It is indicated when cephalopelvic disproportion makes vaginal delivery difficult or dangerous but cesarean section is not available or advised. The procedure involves making a small incision above the pubic bone and gradually separating the joint using a scalpel. Complications can include bleeding, injury to nearby organs, infection, and long-term issues like incontinence or an unstable pelvis.