Why is it that when women live together, their menstrual cycles ten to sync up?

I have three men and three women within my taxi who are wondering roughly speaking that.

At my now partly century mark within my life, I can, surrounded by all confidence, and base on my life experience, especially as the father of all girls, I HAVE NO BLOODY IDEA! pity the pawn.
Answers:

How surrounded by the world do i get rid of this animal bite?

It's a confirmed laboratory result (done on rodents) that females living together for a long time will synchronize their cycles. They influence it's due to pheromone secretions, women detect other women's hormone-caused secretion and their bodies respond/communicate.

If you search online for Menstrual Synchrony, you achieve tons of results. I've posted on article below, but it's not the best one, sorry I couldn't find a really good one. But the poke about phrase will help closely.

Worried im infertile!?

it is all to do next to nature and the path things are in the animal kingdom.
Do not forget that we are animals, breeding mammals.
Take a pack of blustery dogs, all the bitches will come within to season at about impossible to tell apart time, so that when the alpha female have a litter, all females can serve to feed and attention for the pups, this is the packs means of access of making sure the females are happy doing this, most of the bitches will enjoy a phantom pregnancy, so they are more than content to feed and vigilance and feel motherly towards pups that are not nearby own.
Now you have a group of women, adjectives in one place, does it not bring in more sense, for nature to kind them all be going through like peas in a pod, so as that the pack will work better!
Plus, i will be hated for this, but i strongly surface that as animals, without have had any mental progress to become a society, we would more than plausible have lived heaps years ago, as "packs" and many females would enjoy mated beside a dominant male alpha, so this is why profusely of men stray, they are meant to own more than one femal and have not literary to control,animal instict and so this is another reason.
Very close females will stop period if there sister or Friend have, or go through pregnancy symptoms next to a friend, and in my travel case even labor, while a friend is in labor!
Wonderful interrogate!
One other thing i hold always wander is why do other mammals bleed while in season at the time they can mate just twice a year on average, but humans bleed when its not time to mate and every month?

Er. Butt Sex?

generally speaking it's the hormones that are set off from what i know the woman who have the highest estrogen level influences when an other may start and mind you it usually only occur in woman who live together or spend seriously of time together

Birth control.?

Its nature...sorta close to a tribe of lions...Whoever is the dominate one is the ring leader of the ladies..The rest will sink up next to her's and the male will mate will adjectives so they have cubs at impossible to tell apart time. Its just human character.