Dormitory Effect

Dormitory Effect

The menstrual synchrony theory asserts that the menstrual cycles of women who live together (such as in homes, prisons, convents, bordellos, dormitories, or barracks) can become synchronized over time. The existence of menstrual synchrony has not been definitively established, and studies investigating it have been controversial.

Research on human menstrual synchrony, also call the McClintock Effect, or the Wellesley Effect is related to the larger question of whether or not humans have or perceive pheromones and utilize chemosignaling.