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J Comp Psychol. 1998 Sep;112(3):323-4; discussion 325-6.

The assessment of menstrual synchrony: comment on Weller and Weller (1997)

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1
School of Psychology, University of Leeds, United Kingdom. maddya@psychology.leeds.ac.uk

Abstract

A. Weller and L. Weller (1997) claimed to report "the definitive study of menstrual synchrony" (p. 148). To allow for cycle variability, they used the following criterion for synchrony: It occurred in 2 out of 3 months. The underlying assumption of the state of menstrual synchrony is that cycle length variability is minimal. The present article uses a random selection of cycle lengths from a distribution described by R. F. Vollman (1977) to illustrate how variable cycle lengths cause a fluctuation from synchrony to a synchrony. A. Weller and L. Weller's (1997) study is not, therefore, conclusive, and future studies of menstrual synchrony should include an assessment of cycle variability as well as onset difference.

PMID:
9770318
[Indexed for MEDLINE]
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