how about this theory: if you look at the animals world for example – females that group together have a better chance at survival in some species. So when a male comes along to mate – he is able to mate with all of them. That is if one female is in heat – the rest of the females are in prime condition to mate also - increasing the chances of impregnating and procreating…
Whenever I go and stay with my mum I start my cycle again, no matter where Im at in it at the time:toetap05: Its so annoying. I dont know why, I suppose shes just "behind" and it synchronises very quickly?
When I used to work at a resturaunt, all of us girls were on the same schedule. With my female roommates it was the same. And also when I lived with my mom.
it's the real deal. either you menstrate at the same time or one after the other. my best friends and i share the same cycle.