Women do not synchronize their menstrual cycles - PubMed (original) (raw)
Women do not synchronize their menstrual cycles
Zhengwei Yang et al. Hum Nat. 2006 Dec.
Abstract
It is widely believed that women who live together or who are close friends synchronize their menstrual cycles. We reexamined this phenomenon in two ways. First, we collected data on menstrual cycles from 186 Chinese women living in dorms for over a year. We found that women living in groups did not synchronize their cycles. Second, we reviewed the first study reporting menstrual synchrony. We found that group synchrony in that study was at the level of chance. We then show that cycle variability produces convergences and subsequent divergences of cycle onsets and may explain perceptions of synchrony.
Keywords: Estrous synchrony; Human pheromones; Menstrual cycles; Menstrual synchrony; Reproductive synchrony.
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