Do Menstrual Cycles Really Sync Up?

Описание: Have you had your period at the same time as your friends or family members? Is this a physiological effect or coincidence? Join Hank Green as he provides some insight on this phenomenon!

Hosted by: Hank Green
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Sources:
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Images:
Golden Hamster: https://commons.wikimedia.org/wiki/Fi...
Chimpanzee: https://commons.wikimedia.org/wiki/Fi...
Golden Lion Tamarin:https://commons.wikimedia.org/wiki/Fi...