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Estrogen therapy (ET) is a treatment for women that helps replenish low estrogen levels. This therapy involves taking the hormone estrogen on a regular basis.
The body naturally produces less estrogen after menopause, when the ovaries are removed, or as a result of some other health conditions. ET can help reverse the effects of low estrogen, which may include severe menopausal symptoms, such as hot flashes and insomnia, and long-term problems, such as weak and brittle bones (osteoporosis).
Estrogen therapy is also called unopposed estrogen therapy because a second hormone (progestin) is not used along with the estrogen. Estrogen used alone can cause cancer of the lining of the uterus (endometrial cancer). For this reason, unless a woman has had her uterus removed, estrogen usually is combined with progestin; this combined therapy is called hormone therapy (HT).
Last Revised: April 26, 2012
Author: Healthwise Staff
Medical Review: Anne C. Poinier, MD - Internal Medicine & Carla J. Herman, MD, MPH - Geriatric Medicine
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