How do fibroids get developed?

Uterine Fibroids are muscular growth of the uterus that usually occur in child bearing years. They vary in size from seedlings to bulky masses that can distort and enlarge the uterus. The exact cause of developing fibroids are unknown. Fibroids tend to run in families may be due to hormonal changes (increased estrogen levels), other risk factor are obesity and genetic alterations.