Menstruation: Symptoms & Signs

Medically Reviewed on 3/19/2020

Menstruation (also termed period or bleeding) is the process in a woman of discharging (through the vagina) blood and other materials from the lining of the uterus at about 28-day intervals. The process occurs from puberty until menopause (ceasing of regular menstrual cycles), except during pregnancy. This bleeding lasts about 3-5 days.

Women typically experience other symptoms along with menstrual bleeding. These associated signs and symptoms can include

Women may also experience

Cause of menstruation

Menstruation is a result of the hormonal changes that take place during the menstrual cycle that results in ovulation.

Other menstruation symptoms and signs


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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.