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Unformatted text preview: *deliver pups together, pregnant at the same time, those turned out to be more healthy when both together Psychosocial + biological influences on menstruation synchrony, cycle length and regularity Actual experiment: 170 subjects at two all women colleges kept monthly menstrual journals and answered questions about their background, histories, and social habits. Took personality research form E subsets Wanted to predict differences in menstrual synchrony based on those factors 86% did not synchronize with roommate, but there was a trend towards synchrony This experiment did not control for birth control Avoiding synchrony as a female mate choice *Norway rats *results show that synchrony is costly for females *encourages female- female competition...
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- Spring '08