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MyChart
The menstrual cycle is the body's monthly pattern of preparing for a possible pregnancy. The lining of the uterus (endometrium) starts to thicken. One of the ovaries releases an egg. And then, if the egg isn't fertilized or a fertilized egg doesn't attach to the lining of the uterus (implant), the endometrium sheds from the uterus as a menstrual period.
The thickened lining of the uterus (endometrium) is shed, causing menstrual bleeding. Day 1 of the cycle is the first day of menstrual bleeding. Bleeding usually lasts for 4 to 6 days.
The lining of the uterus thickens. Also, inside a sac (follicle) on the surface of an ovary, an egg becomes ready to be released.
The egg is released (ovulation). Ovulation days can range from about day 7 to day 22 of the cycle. But for each person, the ovulation day is often on the same day each cycle.
Current as of: April 18, 2023
Author: Healthwise Staff
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