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The exact cause of uterine fibroids is not known. Fibroids begin when cells overgrow in the muscular wall of the uterus.
After a fibroid develops, the hormones estrogen and progesterone appear to influence its growth. A woman's body produces the highest levels of these hormones during her childbearing years. After menopause, when hormone levels decline, fibroids usually shrink or disappear.
| By: | Healthwise Staff | Last Revised: August 11, 2009 |
| Medical Review: | Sarah Anne Marshall, MD - Family Medicine Kirtly Jones, MD - Obstetrics and Gynecology | |
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