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Name: Unknown
Status:   student
Age:   20s
Location: N/A
Country: N/A
Date: 2000-2001
Question:
I know that it is common for a group of women that spend a lot of time together to eventually have their periods the same time of the month. Could you give me a scientific explanation as to why this is the case? It has happened with my wife, sister, and mother-in law in the same house, and also with a bunch of different women at work who all sit next to each other. Does it have something to do with pheromones?

Replies:
To my knowledege no one yet knows...pheromones?

PF

This topic has surfaced a number of times with much speculation. Pheromones do regulate reproduction in insects species and it has been hypothesized that it may play a role in all mammals as well.

Steve Sample

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