Published Online: 30 JAN 2010
Copyright © 2010 John Wiley & Sons, Inc. All rights reserved.
Corsini Encyclopedia of Psychology
How to Cite
Prior, J. C. and Hitchcock, C. 2010. Menstruation. Corsini Encyclopedia of Psychology. 1–2.
- Published Online: 30 JAN 2010
Menstruation refers to normal vaginal bleeding that is usually monthly. The endometrium (uterus lining) sheds when a woman is not pregnant. The menstrual cycle refers to the time from the menstrual flow until the day before the next bleeding (commonly called a “period”) begins, with normal lengths of 21–36 days (van Hooff et al., 1998). Normal flow lasts for 3–5 days, and the total amount of fluid is about 20–40 mL (4–8 soaked regular tampons or menstrual pads). (Hallberg, Hogdahl, Nillson, & Rybo, 1966)
- menstrual cycle;