A pioneering study of human pheromones found that the menstrual cycles of female college roommates became synchronized over time.

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The study conducted by Martha McClintock in 1971 found that the menstrual cycles of female college roommates became synchronized over time due to the influence of pheromones. This phenomenon is known as menstrual synchrony or the "McClintock effect."

A Pioneering Study of Human Pheromones Found That the Menstrual