translated from Spanish: New experiment explains the evolutionary origin of female orgasm

World.- Women can conceive without climax and also orgasm without penetration. Female pleasure is not necessary for reproduction. A team of scientists believes that in ancient humans, ovulation was induced by copulation, as in cats and rabbits.
Women’s orgasm has been intriguing scientists for years because their role in evolution is unclear. While in men it is linked to ejaculation, women can conceive children without feeling pleasure. It does not have a direct effect on playback. In addition, penetration is not the best way to reach the climax.
“In other words, the rate of orgasms with penetration is lower than with masturbation, so it seems unlikely that there will be a direct reproductive function involved. And finally, the trait seems too complex to appear in non-functionevolution,” he clarifies to Sinc Mihaela Pavlicev, a researcher at the University of Cincinnati (USA) and first author of a study published in the journal PNAS.
To date, the scientific community had proposed different hypotheses. A new work led by Yale University (USA) seeks to test its hypotheses about the possible evolutionary origin of female orgasm, which is unlikely to have evolved by chance.
Stimulation
“We believe that the female orgasm was ancestrally associated with the induction of ovulation through copulation, that is, with the release of eggs from the ovary that in some animals occurs as a result of copulation. We call these induced (or glare) ovulators – rabbits, cats, ferrets and camels. In others, as human and large apes, this type of ovulation is lost and the ovulations are regulated endogenously, without external stimulus, as in the case of women”, emphasizes Pavlicev.
In a previous study of the same team, published in 2016, the researchers came to three conclusions: that there are physiological similarities between female orgasm and mammal orgasm with induced ovulation; induced ovulation pre-endogenously in evolution; and that the anatomy of the female genital organ reflects these changes, “in the sense that animals that require external induction to ovulate have the clitoris in or very close to the copulatory canal, so it is stimulated,” she says.
In humans and large asimies, the clitoris is placed further away from the reproductive system and is therefore often not stimulated during commoneship. “We conclude that these changes are responsible for the frequent lack of orgasm in human sex and that the position of the clitoris reflects the importance of its function and the loss of it,” Pavlicev.
An experiment with rabbits
To corroborate the theory of the ovulatory model, scientists based on the basis that if they disturbed orgasm, so would the induction of ovulation. The experiment was conducted with rabbits who were given daily for two weeks selective serotonin reuptake inhibitors (antidepressants), which cause anorgasmia.
With antidepressants, rabbits had to inhibit their ovulation. Results showed ovulation rates decreased by 30%. In a second experiment, the authors induced ovulation by hormonal injection to conejas treated with antidepressants, and observed that these did not affect the ovulation caused by drugs.
According to the authors, the results support the hypothesis that orgasm in rabbits is homologous to that of humans, and both processes could share a common evolutionary origin. “The mechanism that causes orgasm in humans could be the same as in the evolutionary past that would have been used to trigger ovulation during copulation,” she stresses.
But if the female orgasm lost its reproductive function, why did it stay? “We don’t ask ourselves this question because all the reasons are sought exclusively in reproduction,” she concludes.
Source: Sinc

Original source in Spanish