Multiple influences on menstrual synchrony: Kibbutz roommates, their best friends, and their mothers

Leonard Weller; Aron Weller

doi:10.1002/ajhb.1310050207

Multiple influences on menstrual synchrony: Kibbutz roommates, their best friends, and their mothers

Am J Hum Biol. 1993;5(2):173-179. doi: 10.1002/ajhb.1310050207.

Authors

Leonard Weller¹, Aron Weller²

Affiliations

¹ Departments of Sociology, Bar-Ilan University, Ramat-Gan, Israel.
² Departments of Psychology, Bar-Ilan University, Ramat-Gan, Israel.

PMID: 28524333
DOI: 10.1002/ajhb.1310050207

Abstract

Menstrual onset dates of women living in kibbutzim were compared with those of their roomates, their best friends in the kibbutz, and their mothers. Since these three groups of women constitute the overwhelming number of the subjects' female interactions, this enabled the examination of multiple influences on menstrual synchrony. Synchrony was found between roommates and between best friends, but not between mothers and daughters. The relationships of friendship and joint activities to synchrony were also analyzed. The findings support a pheromonal, and not an environmental, explanation of menstrual synchrony. © 1993 Wiley-Liss, Inc.