Abstract
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 awareness of the phenomenon of menstrual synchrony and to assess their subjective experiences of it. Questionnaires were distributed to a student sample and a sample of women who had previously been recruited to take part in an unrelated study. Questionnaires were returned by 122 women giving a response rate of 52%. Responses indicated that the majority of these women were aware of menstrual synchrony (84%) and most of them reported personal experience of the phenomenon (70%). The experiences described were congruent with the research findings to date and in addition provided information on areas so far neglected, notably, that menstrual synchrony is regarded as a positive experience.