First Time: Researchers Discover Genes for Early Sex

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Source:   —  April 19, 2016, at 3:25 AM

While number single genetic variation can totally affect behavior, the team of British researchers says the gene pattern they've found can account for a significant quantity of the disagreement in when people have sex for the first time.

British researchers declare they may have found a gene that influences people to lose their virginity early.

While number single genetic variation can totally affect behavior, the team of British researchers says the gene pattern they've found can account for a significant quantity of the disagreement in when people have sex for the first time.

And the same genes are associated not only with risk-taking behavior, but with how many children people finish up having and how grumpy they are, the team reports in the journal Nature Genetics.

Overall, they linked thirty-eight different genes to age at first sexual intercourse.

"While social and cultural factors are clearly relevant, we indicate that age at first sexual intercourse is also influenced by genes which act on the timing of childhood physical maturity and by genes which contribute to our natural differences in personality types," said John Perry, a senior investigator at Britain'south Medical Research Council who was involved in the study.

"We indicate that age at first sexual intercourse is also influenced by genes."

"One example is a genetic variant in CADM2, a gene that controls brain cell connections and brain activity, which we found was associated with a greater likelihood of having a risk-taking personality, and with an earlier age at first sexual intercourse and higher lifetime no of children."

The team did what'south called a genome-wide organization study — a giant trawl through all 20.000 genes in the human body.

They used three different databases: Britain'south Biobank, where more than 120.000 men and women have given samples and also filled out detailed questionnaires; Iceland'south population-wide genetic database of 241.000 people and nearly 21.000 women taking portion in the U. S. Women'south Genome Health Study.

Cultural influences have a fairly huge impact on when and how people have sex for the first time, but this study shows genes also play a role and may assistance clarify why so many youthful people defy these rules.

And genes may also regulate the basic biology that underlies sexual behavior, including the onset of puberty, the team said.

"Genetic variants associated with timing of puberty — which has decreased from an average age of eighteen years in one thousand eight hundred-eightieth to 12.5 years in one thousand nine hundred-eightieth — in both men and women have been recently identified, and some studies have reported a correlation between puberty timing and age at first sex, suggesting that they may also be correlated at the genetic level," the team wrote.

"Earlier puberty timing, in both men and women, is associated with greater propensity for risk-taking behaviors, lower educational attainment, greater susceptibility to several adverse health outcomes and, in women, increased mortality," they added.

However, people who start having sex and babies younger finish up having more children, and their genes finish up spreading more widely, something called reproductive fitness, the team noted.

The researchers also said they may also have a scientific basis backing up parents who urge their teenagers to wait.

"We have already shown that early puberty and rapid childhood growth adversely affect sickness risks in later life, but we've presently shown that the same factors can have a negative effect at a much younger age, including earlier sexual intercourse and poorer education attainment," said the Medical Research Council'south Dr. Ken Ong, who led the study.

Teens are known for their like of risky behavior.

The Centers for Sickness Control and Prevention found in a two thousand fourteen survey that nearly twenty-two % of U. S. teenagers admit to having ridden one or more times in a car or other vehicle driven by someone who'd been drinking in the past month, ten % admit to having driven after drinking and nearly eighty-eight % said they pass wearing a helmet while biking all or most of the time.

"Certainly, the age at which a person first has sex is based on a lot more than the age at which they're first biologically capable."

And while the U. S. teen sex rate has dropped from fifty-four % in one thousand nine hundred ninety-first to 46.8 % now, only fifty-nine % said they used a condom the latest time.

This helps clarify the high U. S. teen pregnancy rate. But the CDC also finds that intervention helps - teen sex rates have dropped, as have rates of teen smoking and drinking. Studies indicate that teenagers do hear to their parents' advice when it comes to sex and birth control.

The genes-and-sex study helps confirm this.

"While this study does discover an organization with genetic factors, it nonetheless supports the idea that the age at which a man or woman first has sex is overwhelmingly due to non-genetic factors, such as social or environmental context," said Dr. Alicia Smith, a psychiatrist at Emory University.

"Certainly, the age at which a person first has sex is based on a lot more than the age at which they're first biologically capable. It's also based on cultural and socioeconomic factors that are very challenging to account for in genetic studies," Smith added.

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