Menstrual synchrony

Menstrual synchrony refers to the idea that women who spend a lot of time together, such as roommates or close friends, may start their periods around the same time. This concept suggests that chemical signals, like pheromones, might influence each other's hormonal cycles. However, scientific evidence for menstrual synchrony is mixed; some studies support it, while others find no significant effect. Overall, it remains a debated topic in reproductive research, and individual cycle variations are common without external influence.