Women selectively guard their (desirable) mates from ovulating women. Across 4 experiments, partnered women were exposed to photographs of ovulating or nonovulating women, and consistently reported intentions to socially avoid ovulating women—but only when their own partners were highly desirable.

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Women selectively guard their (desirable) mates from ovulating women. Across 4 experiments, partnered women were exposed to photographs of ovulating or nonovulating women, and consistently reported intentions to socially avoid ovulating women—but only when their own partners were highly desirable.