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Editor's Note: We at PS recognize that people of many genders and identities have menstrual cycles. This particular story includes language from experts who generally refer to people with menstrual ...

Menstruation usually begins around two years after breast development, often between the ages of 12 and 13. This first period is called menarche. The menstrual cycle typically spans about four weeks, ...

"Menstrual cycle syncing" and "hormonal syncing" are terms used to describe adjusting lifestyle habits to optimize health and wellness at every point of a woman's menstrual cycle. New research by ...