By Brittney McNamara. Photo: Getty.
There's something kind of nice about when your period syncs up with all your friends. You're moon friends, goddesses who are one with the heavens above. It makes you want to light some candles, hold hands and free bleed as a single unit, right? Well, put your matches away because apparently that's all a bunch of BS.
Ok, so maybe syncing cycles with your friends isn't quite so spiritually enlightening, but it is kinda fun. But according to science, it's not a real thing. Glamour reports the folks at the period-tracking app Clue teamed up with the University of Oxford to figure out whether menstrual syncing is actually a thing and they found out it's really not. In fact, the menstruators in the study actually got pretty out of sync with their closest friends during the research.
Glamour reports researchers looked at 360 pairs of close-knit women, including friends, roommates, sisters, partners and more. In 273 of the 360 pairs, their cycles were actually farther apart at the end of the three-month study period than when the study began, meaning their cycles didn't sync together, they migrated apart. Contrary to what you might have expected, women who lived together during the research were actually found to have diverging cycles, not converging ones.
Clue data scientist Marija Vlajic told Glamour math and hope are behind the common misconception that menstruates sync up. Because cycle lengths can vary, Marija said general patterns could make your period sync with a friend for a short time, but that doesn't mean you're actually menstruating together.
"Say I get my period today and you get your period in 10 days. At this point, we differ by 10 days, and say that your cycle is two days shorter than mine. So then, when we get our next cycle, the difference will only be eight days," she said.
And when we hear that, we get excited and think about the moon and all that other stuff we mentioned above and basically just want to believe there's some cosmic hold over our uteruses.
"It can be very emotional and very exciting when you notice that you and your friend kind of sync, but it's important to look at it from the more rational side," Marija said.
This story originally appeared on Teen Vogue.
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