Do lunar phases influence menstruation? A year-long retrospective study

Endocr Regul. 2013 Jul;47(3):121-2. doi: 10.4149/endo_2013_03_121.


We assessed with cross-approximate entropy menstruation onset versus moon phases in 74 women with 980 menstrual cycles over a calendar year. In defiance of traditional beliefs and contrary to what some researchers have argued with short-term research work, in this long-term study we did not find any synchrony of lunar phases with the menstrual cycle.

Keywords: menstruation, moon cycles..

MeSH terms

  • Adolescent
  • Adult
  • Cross-Sectional Studies
  • Female
  • Greece
  • Humans
  • Menstruation / physiology*
  • Menstruation / psychology
  • Moon*
  • Periodicity
  • Retrospective Studies
  • Time Factors
  • Young Adult