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

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