For years, researchers have wondered why there is exactly the female orgasm. It plays no role in reproduction and is functionally redundant, unlike many other animals.
But now scientists say that experience is an afterthought of evolution, to the left of our ape ancestors.
In many mammals, the male begins ovulation by sexual stimulation of the woman and took her to be fertile. But in humans that link is lost, since the clitoris displaced from inside the vaginal canal outward at the same time appeared to remove the link between orgasms and reproduction.
Scientists have been puzzled because there seems to be no relationship between orgasm and if sex leads to reproduction or the number of children that can be conceived. So scientists instead explored the hormones released during the act -. And found that those same hormones play an important role in ovulation in many other mammals
This led the researchers to believe that the feature is now called the orgasm had another function in the past, helping to trigger ovulation.
“Previous studies have tended to focus on the evidence of human biology and modifying a trait rather than their evolutionary origin,” said Yale Institute of Biology researcher Gunter Wagner.
But scientists say it is important to note that the evolutionary ancestor of orgasm is not necessarily the same as is seen today.
“It is important to emphasize that it did not look like human female orgasm looks like now,” said Mihaela Pavlicev, who helped lead the study. “We believe [the hormonal surge] is the core that was perhaps further modified in humans.”
However, research worked identifying the increase itself, rather than what is now known as orgasm. It is often difficult to find the same trait in different species as they change over time, but by identifying the surge could crawl through history.
“We believe the increased hormonal characterizes a trait known as the female orgasm in humans,” said Pavlicev. “This knowledge has allowed us to follow the evolution of the property in all species.”