Why do girls periods sync up with each other?
The theory behind the syncing of menstrual cycles is that women's pheromones interact when they are in close proximity, causing them to have their period at the same time.
Do women's periods really sync?
First, we collected data on menstrual cycles from 186 Chinese women living in dorms for over a year. We found that women living in groups did not synchronize their cycles. Second, we reviewed the first study reporting menstrual synchrony. We found that group synchrony in that study was at the level of chance.
Are guys more attracted to you when your on your period?
Studies have shown that men rate women's smells and looks as more attractive during fertile periods of a women's menstrual cycle.
Can your period sync with your best friend?
Most women have experienced having the same period schedule as their friends. You have probably heard that all the hours you spend together caused your menstrual cycle to sync up. However, there is no scientific evidence based on chemicals or hormones to support this theory.