Do Women in Groups Bleed Together? On Menstrual Synchrony | Context and Variation, Scientific American Blog Network | Science News | Scoop.it

Menstrual synchrony is one of those ideas that seems to be confirmed in our daily lives. If we are menstruating at the same time, or close to the same time as a friend, the coincidence takes on a greater meaning, a sign of our time spent together, or closeness as friends or partners. It’s a private way to celebrate our bond. Perhaps for others it serves as another indicator of the ways in which girls and women are ruled by their reproductive biology.