The average menstreual cycle is 29.51 days. A lunar month is 29.53 days
 

Coincidence?

How did the female become in synch with the moonlight?

Why did evolution cause this?

Since me and The Wife is "trying" - maybe we should take this into consiteration? :)

Because being crazy once every month makes us sane.

because moon likes blood, bloody MOOONNN buhahahaha

It was a full moon on August 6, 2009.

A full moon is very powerful.

still havent recovered from that one :helpme

your period is late?

It's probably where the story of werewolves came from. :( monsters coming out once a month in sync with the moon.

The word "menstruation" is etymologically related to "moon". The terms "menstruation" and "menses" are derived from the Latin mensis (month), which in turn relates to the Greek mene (moon) and to the roots of the English words month and moon—reflecting the fact that the moon also takes 27.32 days to revolve around the Earth. The synodical lunar month, the period between two new moons (or full moons), is 29.53 days long.

always:helpme

Just a simple question: why not?

Even more of a question: how is it that women's periods move around to be in synch with the women around them?

Isn't it subconscious pheromones?