Cause
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.1 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.
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