Period Syncing Probably Isn’t Real

“time-lapse photography of moon” by Linda Xu on Unsplash

A very persistent belief among many people who have periods is that when they spend enough time together, especially when sharing a home, their menstrual cycles synchronise. This phenomenon is presented as fact in the media and even in sex education classes. However, while there has been scientific interest in period syncing for a few decades now, it remains controversial.