If the uterus (womb) or bladder slips out of position, this is referred to as a prolapse. It is caused when the supporting fascia and ligaments or pelvis become weak, allowing a part of the uterus or bladder to bulge into the vagina. The most common reason for prolapse are childbirth, menopause, heavy lifting, constipation and genetic factors. Symptoms include pain, heaviness in the vaginal area and a frequent need to pass urine. In mild cases, exercises may help improve the symptoms, but women with more severe prolapses may need to have surgery.