5. Moon Cycles May Affect Your Cycle
LiveScience notes that there’s a lot of speculation whether the moon’s cycles affect women’s menstrual cycles. It notes that menstrual cycles average 28-days, while lunar cycles are solidly 29.5-days.
However, it does point to one study in 1980 published in the American Journal of Obstetrics & Gynecology that shows 40-percent of participants started their period within 2-weeks of the full moon. However, LiveScience adds that a study hasn’t been conducted since to back up these claims or prove their significance.