Women do not synchronize their menstrual cycles

@article{Yang2006WomenDN,
  title={Women do not synchronize their menstrual cycles},
  author={Zhengwei Yang and Jeffrey C. Schank},
  journal={Human Nature},
  year={2006},
  volume={17},
  pages={433-447}
}
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… Expand
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References

SHOWING 1-10 OF 72 REFERENCES
Menstrual synchrony in female couples
The menstrual cycles of cohabitating women have been found to synchronize, possibly through social and pheromonal mechanisms. The extent of this phenomenon, menstrual synchrony, was examined in 20Expand
Menstrual synchrony under optimal conditions: Bedouin families.
TLDR
Menstrual data were collected prospectively for 3 months from 27 Bedouin nuclear families living under conditions optimally conducive for synchrony: a highly sexually segregated society, standard living conditions, and minimal use of oral contraceptives. Expand
Menstrual synchrony in a sample of working women
TLDR
Examination of menstrual synchrony in 51 pairs of women working together under conditions optimally conducive to synchrony found a significant degree of synchrony for each of the 3 months. Expand
Menstrual-cycle synchrony: problems and new directions for research.
  • J. Schank
  • Medicine, Psychology
  • Journal of comparative psychology
  • 2001
TLDR
The author analyzes their new methodology and presents 2 simulation studies that demonstrate how biases and errors can produce synchrony as an artifact and suggests that synchrony may be a biological state to be avoided and that cycle variability may facilitate female mate choice. Expand
Menstrual synchrony: awareness and subjective experiences
Menstrual synchrony occurs when the time difference between the onsets of menstruation of two or more women shifts such that they become closer. The aim of this study was to examine women's awarenessExpand
Two studies of menstrual synchrony: Negative results
TLDR
Whether or not menstrual synchrony occurs among women who spend time together should still be considered a hypothesis requiring further investigation. Expand
Multiple influences on menstrual synchrony: Kibbutz roommates, their best friends, and their mothers
  • L. Weller, A. Weller
  • Psychology, Medicine
  • American journal of human biology : the official journal of the Human Biology Council
  • 1993
TLDR
A pheromonal, and not an environmental, explanation of menstrual synchrony is supported, which was found between roommates and between best friends, but not between mothers and daughters. Expand
No evidence for menstrual synchrony in lesbian couples
TLDR
There is no solid evidence that menstrual synchrony is a stable attribute of past or contemporary human populations, and there was no evidence of convergence between dyads in menses onset dates. Expand
Menstrual variability and the measurement of menstrual synchrony
TLDR
This paper examines how each of five different ways of measuring menstrual synchrony deals with menstrual variability and irregular cycles and recommends the approach in which women record their onset dates after they have been together for a prolonged period of time. Expand
Menstrual Synchrony Under Optimal Conditions: Bedouin Families
To investigate menstrual synchrony a 3-month prospective study was conducted among 27 Bedouin nuclear families from northern Israel living under 4 conditions optimally conducive for the convergenceExpand
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