Diminishment of the endometrium through lack of support by, especially, the hormone estrogen or by the loss, through chronic endometritis and/or injury at curettage under abnormally low estrogen conditions, of subsequent receptiveness to estrogen. Can cause light periods hypomenorrhea or absent periods amenorrhea.

Literally, an absence of nutrition, but in particular the result of such lack in a tissue, which shrinks and loses its normal function. For examples, see endometrial atrophy and follicular atresia. Sometimes the end-result of necrosis.

An operation performed at hysteroscopy to treat menorrhagia by intentionally producing endometrial atrophy and intrauterine adhesions.

Light periods, particularly in a woman who has previously had much heavier periods. Occurs normally on the oral contraceptive (birth control) pill. Occurs abnormally with intrauterine adhesions or endometrial atrophy; see also Asherman's syndrome.