Here, it lies midway between the anterior superior iliac spine and the symphysis pubis. Degeneration of the symphysis pubis accompanies aging and postpartum. Shoulder dystocia can result from the anterior shoulder becoming impacted on the maternal symphysis pubis. Symphysiotomy is the surgical opening of the symphysis pubis. In some women this separation can become a diastasis of the symphysis pubis. Certain skeletal joints such as the pubic symphysis and sacroiliac widen or have increased laxity. The proximal attachments are the pubic crest and the pubic symphysis. A 12-year-old boy, associated with bifid scrotum, epispadia and pubic symphysis diastasis. In humans linea alba runs from the xiphoid process to the pubic symphysis. In males, the suspensory ligament of the penis attaches to the pubic symphysis. Adductor&colon; originates on the pelvic symphysis and inserts on the lateral femur. The pubic symphysis is a nonsynovial amphiarthrodial joint. Also, several extinct giant lemurs exhibited a fused mandibular symphysis. The left and right hip bones join at the pubic symphysis. In males, the base of the bladder lies between the rectum and the pubic symphysis.