How common are uterine fibroids?

Uterine fibroids are noncancerous growths in the uterus. They are the most common type of solid tumor that can grow in the pelvis. Fibroids affect 20% to 40% of all reproductive-aged women.1

Most women with fibroids do not have symptoms. For those who do, symptoms can range from mild to severe. Symptoms depend on how large a fibroid is, where it is, and whether it is bleeding or pressing on an internal organ.

Uterine fibroids are more common:

  • Among black women than white women.
  • As women age, especially from their 30s and 40s until menopause, usually at about age 50.


  1. Day Baird D, et al. (2003). Highly cumulative incidence of uterine leiomyoma in black and white women: Ultrasound evidence. American Journal of Obstetrics and Gynecology, 188(1): 100–107.

Last Updated: August 11, 2009

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