Study looks for the causes of female climax
For years, doctors and scientists have been wondering how exactly a female orgasm works or why it actually exists. Because actually the female climax does not play a decisive role in reproduction and is therefore functionally rather redundant. Researchers have now discovered that the female climax is a long-ago idea of evolution that is still connected to our ancestors, the monkeys.
Unlike many mammals, female orgasm in humans is not really necessary for reproduction. For this reason, it is unclear why this effect exists in humans at all. Scientists from the internationally recognized Yale Biology Institute announced in a press release that the female climax appears to be just a happy consequence of our evolutionary past. In this, the female orgasm also served to stimulate ovulation. This is the conclusion reached by experts from Yale Yale University in New Haven and Cincinnati Children's Hospital in a joint investigation. The experts published the results of their study in the journal "JEZ-Molecular and Developmental Evolution"
For many men, it is not clear how women get an orgasm. However, there is also the question among researchers and doctors why the female climax even exists. After all, it is not needed for our reproduction. (Image: Igor Mojzes / fotolia.com)
Female climax only the result of an ancient function?
Earlier studies had focused on clues from human biology rather than the evolutionary origin of the female climax, says author Professor Gunter Wagner of the Yale’s Systems Biology Institute. The scientists now assume that the female orgasm is the result of an ancient function that was involved in the induction of ovulation. At the time, the female climax might have released hormones that played an important role in reproduction, the experts speculate.
In many mammals, climax is important for ovulation
Since there is no obvious connection between the climax and the number of offspring or the successful reproduction in humans, the scientists focused on a certain physiological property. This was the neuroendocrine discharge of prolactin and oxytocin, the doctors explain in their study. To this end, the experts examined the same activity in the placenta of other mammals. The experts were able to determine that this reflex plays an important role in ovulation in many mammals.
Males often induce ovulation in mammals
Despite the vast diversity of mammalian reproductive biology, some key traits can be traced throughout the evolution of mammals, the researchers explain. For example, the female ovarian cycle in humans is not dependent on sexual activity. In other mammals, however, ovulation is often induced by the male, the experts say. In these animals, hormones are released, which then cause ovulation.
Male-induced ovulation probably developed first in evolution, which later gave rise to the derived characteristic of cyclical or spontaneous entry, the doctors explain. The researchers suspect that male-induced ovulation developed about 75 million years ago. It originated in rodents and primates. Later, with the development of the so-called ovarian cycle in primates, it became superfluous for reproduction, explains Professor Wagner.
What is the role of the human female climax today?
The scientists suspect that female orgasm was developed to adapt to a direct reproductive role. This reflex of inducing ovulation became superfluous later in evolution. For this reason, the female climax only plays a secondary role in reproduction, say the doctors. The situation is very different for men. You need the orgasm with subsequent ejaculation to reproduce. This is the only way that the semen can get into the woman's uterus.
So it remains unclear exactly what role female orgasm plays in today's world, say the scientists. However, it should be noted that the process was completely different at the time than today's female orgasm, explains researcher Mihaela Pavlicev. The female climax may have taken on a completely different function nowadays after it has become superfluous in reproduction, Pavlicev adds.
The position of the human clitoris has changed considerably in the course of evolution
A comparative study of the female genitals also showed that with the development of spontaneous ovulation, the clitoris also changed its position, the doctors explain. This anatomical change made the clitoris less likely to receive adequate stimulation during human intercourse to trigger the neuroendocrine reflex (orgasm). If mammals need an orgasm for their reproduction, the sexual organ is nearby or even in the female sexual channel, the experts explain.
This arrangement can be explained by the fact that such animals are dependent on the best possible stimulation during the act. In humans or in general in mammals with an ovarian cycle, the clitoris is usually somewhat further away. This is also the reason why some women cannot feel orgasm due to the pure penetration during the sexual act, explains Pavlicev.
The penis and clitoris are formed from the same tissue
Many researchers hypothesize that the female climax is a random consequence of the male orgasm, so to speak. When embryos develop, organs are formed from the same tissue in boys and girls at an early stage, the doctors explain. Therefore, the male penis and the female clitoris are endowed with similar neural structures.
Possible physiological sense of the female climax
But there is also the view among scientists and medical professionals that the female orgasm has a logical physiological meaning. During the female climax, the vagina and uterus contract. In addition, the cervix begins to lower. All of these processes could increase the likelihood of fertilization. (as)