Menstrual cycle synchronization

Menstrual cycle synchronization, often referred to as the "McClintock effect," is the phenomenon where women living closely together, such as roommates or friends, may experience their menstrual cycles aligning over time. This suggests that their cycles may begin to occur around the same time each month. While some studies have supported this idea, others have found little evidence of synchronization. The underlying mechanisms are not well understood, and it remains a debated topic among scientists. Factors such as pheromones, environmental conditions, or social interactions could play a role, but further research is needed to draw definitive conclusions.