MyChart
Menstrual flow
The menstrual cycle is the series of changes the body goes through to prepare for a pregnancy. About once a month, the lining of the uterus (endometrium) thickens. Then an ovary releases an egg. If the egg is fertilized by sperm and attaches to the lining of the uterus (implants), pregnancy begins. If the egg isn't fertilized or a fertilized egg doesn't implant, the lining of the uterus is shed. This is the monthly menstrual bleeding (also called menstrual period) that happens from the early teen years until menopause, around age 50.
Current as of: April 30, 2024
Author: Ignite Healthwise, LLC Staff
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All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
