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Hum Nat

Title:		Women do not synchronize their menstrual cycles
Author(s):		Yang Z; Schank JC;
Address:		"North Sichuan Medical College, Nanchong, People's Republic of China. Department of Psychology, University of California, One Shields Ave., 95616, Davis, CA, USA. jcschank@ucdavis.edu"
Journal Title:		Hum Nat
Year:		2006
Volume:		17
Issue:		4
Page Number:		433 - 447
DOI:		10.1007/s12110-006-1005-z
ISSN/ISBN:		1045-6767 (Print) 1045-6767 (Linking)
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;
Notes:		"PubMed-not-MEDLINEYang, Zhengwei Schank, Jeffrey C eng 2006/12/01 Hum Nat. 2006 Dec; 17(4):433-47. doi: 10.1007/s12110-006-1005-z"