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Uterine Fibroids Health Center

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Uterine Fibroids - 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. 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.

Recommended Related to Uterine Fibroids

Understanding Uterine Fibroids -- the Basics

The uterus is a muscular, hollow, pear-shaped organ in the pelvis. The lower portion narrows into the cervix, which opens to the vagina. Fibroids are benign (noncancerous) tumors, or growths of the muscle and connective tissue of the uterus. They usually grow slowly and may occur inside the uterus, within the uterine wall, or on the outside surface of the uterus. They occur in 20% to 50% of women of reproductive age. Fibroids are more common in African-American women. Women with fibroids...

Read the Understanding Uterine Fibroids -- the Basics article > >

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WebMD Medical Reference from Healthwise

Last Updated: April 19, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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