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Girls On Their Period, Why Do They Sync?

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Dear BeingGirl Experts,

I wanted to know why some family members get their period at the same time.

 

Anna

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Dear Anna,

This is a phenomenon known as menstrual synchrony. It occurs when women share the same living space. Each woman secretes substances called pheromones. These are scents (chemical means of communication) that are undetectable to our conscious sense of smell. However the female who produces the strongest pheromones causes the other females menstrual cycles to move closer to hers.

 

Hope this is helpful

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34
comments so far
Miner1667joe
Miner1667joe
Posted July 24, 2014
I can't believe this. This happens to my friend and me and I don't even see her that much.
lovenovela
lovenovela
Posted May 30, 2014
Me and my mom had our periods at the same time!I'm not on it right now but it will come back.By the way the cramps get worse when your on your period.
Jeansmbw
Jeansmbw
Posted April 16, 2013
Cool that's interesting
Booboobear678
Booboobear678
Posted March 29, 2014
Is it normal to have the same schedule as your teacher?
MiaBella
MiaBella
Posted March 29, 2014
i just got my second period and i am in sync with my friends that have already been getting there period for longer! there are 4 of us
anniegirl20
anniegirl20
Posted March 29, 2014
so does that mean me and my mom will be around time?
Best Dancer1
Best Dancer1
Posted January 03, 2013
It weird because I live 9 hours away from one of my sisters but every time I see her we are both on our periods at the same time.
musicalgirl12
musicalgirl12
Posted August 09, 2012
319princess u may have it at the same time she did but u might not. my mom had hers at 13 i had mine at 11. so chances r urs wil be around the same time. hope this helped!:)
sweetkitty14
sweetkitty14
Posted October 09, 2012
I didn't even know this! That's weird...but cool at the same time. I've always wondered why my mom and I often get our periods almost at the same week of the month. First she gets hers on the first days, and then I get mine. And my usual 7 day period cut down to 5, just like hers. LoL.
MustBMe
MustBMe
Posted September 16, 2012
could this be genetic? two of my sisters live with one family, and me and my other sister live with another, but often when we visit we are all on our periods.
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