Most women have heard that when they are in close proximity with other women for long enough, their menstrual cycles will eventually sync up. There is a lot of anecdotal evidence supporting this and earlier studies some provided some evidence. But recent studies that have been “more rigorously designed” have “generally failed to show any synchrony between menstrual cycles in women living together,” says Dr Jewel Kling, chair of women’s health at the Mayo Clinic in Arizona.
Dr. Rachel Jensen, Darney-Landy fellow at the American College of Obstetricians and Gynecologists says she understands why this belief is so popular: “The idea that our bodies would synchronize with those we are close to is comforting and connecting.”
