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Endometrial hyperplasia is an abnormal thickening of the uterine lining (endometrium) that often causes heavy uterine bleeding. If

Endometriosis (say "en-doh-mee-tree-OH-sus") occurs when cells that are like the cells that line the inside of your uterus grow

An enzyme is a protein produced by the body to speed up a specific chemical reaction in the body. The body produces many different

The eustachian tubes run between the inside of the ears and the back of the throat. When a person swallows, the eustachian tubes

Estrogen therapy (ET) is a treatment that helps replenish low estrogen levels. This therapy involves taking the hormone estrogen

The Epstein-Barr virus infects almost everyone by the age of 40 and usually does not cause any illness. But it can cause

Encephalitis is a swelling (inflammation) of the brain. It is usually caused by a virus. The normal blood flow to the brain

Endoscopy is a test that uses a thin, flexible, lighted viewing instrument (endoscope) to allow a doctor to examine the inside of

The endometrium is the mucous membrane that lines the inside of the uterus. The endometrium changes throughout the menstrual cycle

Endocarditis (say "en-doh-kar-DY-tus") is an infection of the heart's valves and inner lining (endocardium) of the heart chambers