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Endometrium

The endometrium is the mucous membrane that lines the inside of the uterus (womb).

The endometrium changes throughout the menstrual cycle. It becomes thick and rich with blood vessels to prepare for pregnancy. If the woman does not get pregnant, part of the endometrium is shed, causing menstrual bleeding.

ByHealthwise Staff
Primary Medical ReviewerSarah Marshall, MD - Family Medicine
Specialist Medical ReviewerFemi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology
Last RevisedMarch 20, 2013

WebMD Medical Reference from Healthwise

Last Updated: March 20, 2013
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