Uterine fibroids are benign, non-cancerous, growths — within or on the muscular walls of the uterus or womb. As many as 20 to 40 percent of women over the age of 35 have fibroids. They can be caused by a combination of genetic, hormonal or environmental factors; however the true cause is unknown. Typical symptoms include abdominal pain, pelvic pain, back pain, as well as heavy bleeding and pain during menstruation. Fibroids can also cause pressure symptoms such as constipation, frequent urination, pain with intercourse and infertility.