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Why do girls periods synchronize?

 
  

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Ellis
20:35 / 01.09.01
Just curious!

Why do they all synchronize when abunch of girls have been living together or working together for some time?

Weird gravity?
 
 
Jack Fear
22:43 / 01.09.01
Nahh. It's the concentration of airborne pheromones, acting as hormonal triggers: the greater the density of the population, the more complete the synchronization.
 
 
The Puck
23:34 / 01.09.01
cos there strange, dont trust em
 
 
Lurker in the corner
23:57 / 01.09.01
So that all females in a tribe are fertile at the same time, so the alpha male has a better chance to expand the herd.
 
 
autopilot disengaged
12:45 / 02.09.01
uhhh...

hastily slipping on hotMALE fictionsuit:

so. uh: any group a herd girlz out there lookin' 4 n alpha male?
 
 
Lionheart
14:30 / 02.09.01
quote:Originally posted by Cobweb:
So that all females in a tribe are fertile at the same time, so the alpha male has a better chance to expand the herd.


I knew that wolves and probably dogs have alpha males but I've never heard of primates having alpha males in their society.
 
 
Enamon
17:25 / 02.09.01
Fuck Alpha males. I am the Omega Man!
 
 
w1rebaby
18:32 / 02.09.01
"Interesting" fact: When I lived with four female flatmates, I used to find that I started to get very edgy and irritable about once a month. It took me some time to work out that this corresponded to just before their periods.

Of course it's far more likely that I was unconsciously picking up on their own PMT and getting wound up myself without realising, rather than being affected by pheremones myself, but it's a good story.
 
 
Saint Keggers
13:29 / 03.09.01
quote:
cos there strange, dont trust em

As someone once said..'I dont trust anything that bleeds for three days and doesn't die.'
 
 
deletia
13:38 / 03.09.01
Yep. We hate women here. But we love comics. And Transformers. And Harry Potter.

But hate women.
 
 
autopilot disengaged
14:24 / 03.09.01
speak f yrself, dude.

i love ALL women.

seriously -

pm me.
 
 
Mordant Carnival
17:30 / 03.09.01
quote:Originally posted by Lionheart:


I knew that wolves and probably dogs have alpha males but I've never heard of primates having alpha males in their society.


Chimps do. They have an alpha male who kickes everyone around and until recently was believed to father the most ickle babby chimps due to his exalted role. Then some researcher noticed that female chimps only fake faithfullness to Alphie- they sneak off into the bushes to have it away with the nice sensitive chimp blokes who babysat and whatall.

The Alpha Male is a cuckold. For some reason, that made me chuckle...
 
 
w1rebaby
17:56 / 03.09.01
read Will Self's Great Apes for an anthropic viewpoint on chimp society... ah hell, just read it because it's good
 
 
Mordant Carnival
19:44 / 03.09.01
Yeah. I like it. Bit too near the knuckle in places tho'.

Altogether now: "fuuuuuuuckoooooof!"
 
 
Saint Keggers
03:20 / 04.09.01
Hey, I dont HATE women! I dont trust them..but I am rather fond of them.
 
 
ceridwen
03:30 / 04.09.01
funny that only males responded to this topic.
 
 
ephemerat
12:43 / 04.09.01
Funny that you have assumed that only males have responded to this topic.

Can anyone explain to me (if we are currently running with the alpha male/adulterous herd posit) why you would want your entire tribe/group pregnant at the same time? Wouldn't it make more sense for them to do it in shifts? Surely even one baby is a defensive liability/pressure on resources/attractive food source for predators? A profusion of them creates a huge potential vulnerability for attack from rival groups or predators while simultaneously taxing the entire group. We could tie this behaviour to seasonal bounties, but humans are sexual all year round, seems a funny way of doing things if you ask me. More of God's Greatest Mistakes...
 
 
mondo a-go-go
12:52 / 04.09.01
and here's me thinking that getting your period meant you had become a woman
 
 
autopilot disengaged
13:07 / 04.09.01
heeyyyy...

you'll alwayz be laydeez to me...
 
 
deletia
13:10 / 04.09.01
quote:Originally posted by kegboy:
Hey, I dont HATE women! I dont trust them..but I am rather fond of them.


You see, I hope he's joking. But I honestly don't believe he is.
 
 
Cherry Bomb
13:51 / 04.09.01
My mom and I used to play "Who's the dominant female?" game back when we lived together. Whoever got her period first won. Now that she's post-menopausal we can't play anymore. But that does mean I won the war.

Weird, I know. But fun!

And when I got mine for the first time, it was two days before my 14th birthday and my mom wrote "Congratulations on becoming a woman!!! I'm so proud of you!"

This doesn't really answer your question, I know.
 
 
Mordant Carnival
18:42 / 04.09.01
quote:Originally posted by ceridwen:
funny that only males responded to this topic.


Oi! Who're you calling male?
 
 
Mordant Carnival
18:44 / 04.09.01
quote:Originally posted by ephemerat:
Funny that you have assumed that only males have responded to this topic.

Can anyone explain to me (if we are currently running with the alpha male/adulterous herd posit) why you would want your entire tribe/group pregnant at the same time? Wouldn't it make more sense for them to do it in shifts? Surely even one baby is a defensive liability/pressure on resources/attractive food source for predators? A profusion of them creates a huge potential vulnerability for attack from rival groups or predators while simultaneously taxing the entire group. We could tie this behaviour to seasonal bounties, but humans are sexual all year round, seems a funny way of doing things if you ask me. More of God's Greatest Mistakes...



Interesting point. Actually, a lot of fertility rites seem to have been used as a way of making sure that all the women are knocked up at a convenient time, to the baby will be born in temperare weather and there will be no pressing work for the women, such as a harvest to be gathered in.
 
 
Lionheart
20:07 / 04.09.01
Maybe we have kids so we can eat them when there's nothing else available. Gives a new whole meaning to the term "baby farm".

It's babylicious!
 
 
ephemerat
14:25 / 05.09.01
quote:Originally posted by kooky has go-go power:
and here's me thinking that getting your period meant you had become a woman


See above post. The period is the clearly visible signal of a cycle of fertility. Having all the females simultaneously at their most fertile would then statistically suggest that they will all fall pregnant simultaneously.

Which strikes me as damned foolish.

Mordant: Tres mucho for the fertility rite posit. Makes a great deal of sense.
 
 
Kit-Cat Club
14:40 / 05.09.01
Hmmm... the fertility cult of Fauna in Rome held its rite at the beginning of December; it involved the female celebrants working themselves into a sexual frenzy and then (apparently) fucking anyone they could find... it says here that when all else failed they would have sexual congress with donkeys, tho to me that sounds apocryphal (women are often accused of bestial leanings by men - I first noticed this in the sex museum in Amsterdam).

Aaanyway, the point being, that this would mean that the throng of children conceived during the rite would have been born at the beginning of August, so that most of their early months would have been winter ones, which doesn't strike me as particularly good planning. I think that fertility rites are more often associated with agriculture than procreation (though they are of course connected).

It might be worth noting that periods are far more regular now, for most women, than they were in the past - this is thought to be because of dietary improvements. Medication also contributes to regularising the cycle (and does destroy synchronisation), while fixing it to the lunar 28-day month, unless you fiddle with the Pill. So presumably some of the biology of synchronisation would also have contributed to increasing the general fertility of a population.
 
 
Tryphena Absent
22:47 / 05.09.01
Think about cats. All cats go on heat at the same time of the year: that pretty much brings me to the conclusion that there is no logic in procreation. Why would all cats be pregnant at the same time? None of it makes any sense!
 
 
Lurker in the corner
05:10 / 06.09.01
quote:Originally posted by ceridwen:
funny that only males responded to this topic.


Hmmm, as i have a vagina and have borne a child, I believe that I techincally qualify as a female. I might be wrong, though, lemme check...yep, says Female on my birth certificate.
 
 
A
11:03 / 06.09.01
Regarding Primates having alpha males-
my wife (who is very keen on apes, no, not in that way) informs me that as far as the 4 other members of the great ape family (apart from humans) go-
Gorillas and Chimpanzees have male oriented societies with alpha-males.
Orangutans sort of have alpha males, but they're usually very solitary.
Bonobos, who are possibly the closest to humans, have female-oriented societies and literally spend all day fucking each other. they treat sex considerably more casually than humans treat handshaking.
I don't know if early human societys were like bonobo societys, but with any luck maybe future human societys will be.

adam
 
 
mondo a-go-go
11:57 / 06.09.01
quote:Originally posted by ephemerat:
See above post. The period is the clearly visible signal of a cycle of fertility. Having all the females simultaneously at their most fertile would then statistically suggest that they will all fall pregnant simultaneously.

Which strikes me as damned foolish.


first of all the rolling eyes was a little dig at ellis' use of the term "girls" in the subject-header, and not meant in seriousness.

second of all, thinking about it, it's not really that preposterous: women don't automatically become pregnant every time they have unprotected sex. in medieval and primitive societies women were considered outcasts if they couldn't conceive. i'm not sure how this is tolerated in the animal world, maybe like runts, infertile females become outcasts too. so therefore, maybe biology is trying to cover the bases to ensure that if any of the females are infertile, then at least a few of them are likely to conceive. but there's no way of judging what the divide will be, so hit them all at once just in case?
 
 
ephemerat
13:16 / 06.09.01
Hmm... sounds reasonably plausible.

I was also ruminating on the possibility that if you have all the females at their most fertile at the same time and you do have a single alpha male procreating with them, he's unlikely to be able to get around all of them in one night. So, say he makes some of that spangly, extra-special, alpha-love with two or three each evening then this will automatically stagger pregnancies.

Of course, it does depend on a fairly limited rapaciousness on his part and as we've already discerned that the females aren't going to remain faithful to the poor, deluded, testosterone-overloaded dupe and that humans are much more like the randy, little bonobos anyway it seems we still haven't really come any closer to a genuine understanding. Will sit with a deep-looking expression for a little longer and hope to tag along behind some passing inspiration...
 
 
RiffRaff
17:06 / 06.09.01
quote:I was also ruminating on the possibility that if you have all the females at their most fertile at the same time and you do have a single alpha male procreating with them, he's unlikely to be able to get around all of them in one night. So, say he makes some of that spangly, extra-special, alpha-love with two or three each evening then this will automatically stagger pregnancies.

Or, if he's got less stamina than that, he might just choose the few most desirable, thus only the genetically-superior females concieve...
 
 
A
01:32 / 07.09.01
...but if certain females can't conceive with the alpha male, they won't put up with that sort of shabby crap, they'll sneak off with another male and get knocked up by him.
adam
 
 
Lurker in the corner
04:06 / 07.09.01
Periods can be effected by a woman's diet. Anorexics frequently stop their periods because the body thinks it is starving, and therefore this is not a good time to be fertile. Obviously there isn't enough food to feed a child. Althetes will lose their periods because of the muscle/fat ratio, because the boyd thinks that it is being worked heavily. Obviously there it is too much work to be done, time isn't right for a child. Now, that is simplisitic, but it makes sense. Women in a prehistoric tribe became fertile at the same time, in times of abundance when the tribe was not travelling or in a dangerous situation. It is ideal for periods to synchronise.
 
 
Kit-Cat Club
04:06 / 07.09.01
quote:Originally posted by Cobweb:
Women in a prehistoric tribe became fertile at the same time, in times of abundance when the tribe was not travelling or in a dangerous situation. It is ideal for periods to synchronise.


This does make a lot of sense for nomadic peoples, and it's the same with herd animals, isn't it? Perhaps the most significant feature of the human menstrual cycle is in fact flexibility and ability to adapt to circumstances...
 
  

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