Why do my BFFs and I all get our periods during the same week?

“Research shows women who live together do start to synchronize their periods. Whether or not this happens among friends is not as well-known,” says Dr. Hillard. But Dr. Hillard speculates that these in-sync periods may depend on how much you and your buds hang out together.

“It may relate to the secretion of pheromones in the air,” she explains. Pheromones are chemical signals that regulate bodily functions. Sounds like an excellent topic for your next science research project!

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by GL | 2/1/2016
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