Menstrual synchrony in female couples.

Area of Science:

• Human Physiology
• Social Psychology

Background:

• Cohabitating women's menstrual cycles may synchronize.
• Potential mechanisms include social cues and pheromones.

Purpose of the Study:

• To investigate menstrual synchrony in lesbian couples.
• To identify factors influencing synchrony in this population.

Main Methods:

• Study involved 20 cohabitating lesbian couples.
• Menstrual cycle data was collected and analyzed for synchrony.

Main Results:

• Menstrual synchrony was frequent, with 50% of subjects menstruating within 2 days of their partner.
• Factors like shared activities, friendship, and regular cycles correlated with synchrony.

Conclusions:

• Menstrual synchrony occurs commonly in lesbian relationships.
• Social and behavioral factors play a role in menstrual cycle synchronization.