Skip Navigation

Menstruation and Menstrual Problems: Overview

Skip sharing on social media links

Menstrual irregularities are changes to the menstrual cycle that result in missed periods, irregular periods, or excessive bleeding. The NICHD is one of many federal agencies and NIH Institutes working to understand menstrual irregularities. The NICHD supports and conducts research on what causes menstrual irregularities and how best to treat and detect them. 

​​​ arrow pointing left For more information about this topic, select the Condition Information, Research Information, Clinical Trials, or Resources and Publications link in the menu on the left.

Common Names

  • Period
  • Menses
  • Monthly bleeding
  • Menstrual period

Medical or Scientific Names

  • Menstruation
  • Menstrual irregularities
BOND National Institues of Health Home Home Division of Intramural Population Health Research