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chiasmus

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Scientists ponder an evolutionary mystery: The female orgasm
« on: August 05, 2016, 11:00:30 am »
http://www.todayonline.com/daily-focus/science/scientists-ponder-evolutionary-mystery-female-orgasm

But now, Prof Pavlicev and her colleague, Professor Gunter Wagner of Yale University, are making the case that the human female orgasm has a deep evolutionary history that reaches back to early mammals.

They began by getting better acquainted with the sex lives of other animals, poring through obscure old journals to gather information on species ranging from aardvarks to koalas.

They noted that many female mammals release oxytocin and prolactin during sex — the hormones released by women during orgasms. What is more, in many of those species, females use a radically different kind of reproduction.

While women release an egg each month, other female mammals, such as rabbits and camels, release an egg only after mating with a male.

Ovulatory cycles evolved in only a few lineages of mammals, including our own, the researchers found. Before then, our ancient mammal ancestors originally relied on ovulation triggered by sex with a male.

Those early mammals developed a clitoris inside the vagina. Only in mammals that evolved ovulatory cycles did the clitoris move away. Based on these findings, the researchers argue that the female orgasm first evolved as a reflex to help females become pregnant.

When early mammals mated, the clitoris could send signals to the brain, triggering hormones that released an egg. Once the egg became fertilised, the hormones may have helped ensure it became implanted in the uterus.

This arrangement has worked well for mammals that rarely encounter males. It helps females make the most of each mating.

But eventually some mammals, including primates like us, started spending their lives in social groups. Females had access to regular sex with males, and orgasm as an ovulatory mechanism was no longer so useful. Our female forebears instead evolved a new system: Releasing eggs in a regular cycle.

As the original purpose of the orgasm was lost, the clitoris moved away from its original position. Prof Wagner speculated that this shift was part of evolution’s dismantling of a sensor system: “You don’t want to have the old signal sending noise at the wrong time,” he said.

“Basically, we don’t know why this happened,” he added. But across mammalian species, “it’s just a very strong evolutionary pattern.”



If what the scientists said was true, then our female ancestors didn't have monthly periods either. 

I think most women would rather be living in that era:- no periods and men must ensure women have orgasms so as to get them pregnant.
洪荒之力 >> ding ding dong dong pew pew pew pew

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dancingstar

Re: Scientists ponder an evolutionary mystery: The female orgasm
« Reply #1 on: April 07, 2017, 01:49:40 pm »
surprise so little of us commenting on this... ^.^

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beaverjuice

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Re: Scientists ponder an evolutionary mystery: The female orgasm
« Reply #2 on: April 07, 2017, 04:05:04 pm »
Periods bad .... very bad .....

Orgasm good ..... very good .....
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