NetWellness is a global, community service providing quality, unbiased health information from our partner university faculty. NetWellness is commercial-free and does not accept advertising.
Thursday, March 23, 2017
Acute shortening of my menstrual cycle
Why would my menstral cycle shorten to 21 days or less without a gradual change to this end?
Normal menstrual cycles are 21-35 days. Shorter cycles can happen, especially in adolescents and perimenopausal women, but should be discussed with your physician.
Cynthia B Evans, MD
Clinical Associate Professor of Obstetrics & Gynecology
College of Medicine
The Ohio State University