Do women who live together tend to menstruate at the same time? Many women believe that, but experts say it’s just coincidence.
Is it true women who live together will menstruate at the same time?Menstrual synchrony, as it is known, does occur occasionally, but not because of proximity or the release of chemical pheromones, which has long been a popular theory.
McClintock, professor emerita of psychology at the University of Chicago, says the science has changed since her original paper was published. She now believes that pheromones secreted from the armpits of women in close quarters changes the timing of ovulation, prompting simultaneous ovulation — not menstruation.“I am aware of all this focus on mathematics, but we’ve gone beyond that,” she says. “In the phrase ‘menstrual synchrony,’ scratch out ‘menstrual’ and put in ‘ovulation’.
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