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Having brothers makes you 1 percent more likely to be gay

Between 2 and 11 percent of human adults report experiencing some homosexual feelings, though the figure varies widely depending on the survey. Homosexuality exists across cultures and even throughout the animal kingdom, as the authors of a mammoth new review paper on homosexuality write. Between 6 and 10 percent of rams prefer to mount other rams, not ewes. Certain groups of female Japanese monkeys prefer the company of other females:. In certain populations, female Japanese macaques will sometimes choose other females as sexual partners despite the presence of sexually motivated male mates. Female Japanese macaques will even compete intersexually with males for exclusive access to female sexual partners.
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Having Older Brothers Makes You More Likely To Be Gay, Says Study

Having brothers makes you 1 percent more likely to be gay
Having brothers makes you 1 percent more likely to be gay
Having brothers makes you 1 percent more likely to be gay
Having brothers makes you 1 percent more likely to be gay
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What Are the Causes of Homosexuality? - The Atlantic

The research, led by a team from Brock University but involving various universities, has seemingly confirmed that male sexual orientation is likely determined before birth. The team came to their conclusions by testing 16 women with no sons, 72 mothers of straight men, 31 mothers of gay sons with no older brothers, 23 mothers of gay sons with olders brothers and a control group of 12 men. These antibodies then build up in the mother's body and, when she becomes pregnant with another son, can cross the placental barrier and enter her bloodstream and then the brain of the foetus. The researchers found that mothers who had gay sons, especially those with older brothers, had significantly higher levels of the NLGN4Y antibody than the other women tested. The Health Sciences Professor, thinks that this study is groundbreaking for two main reasons. However Bogaert, retains an air of caution regarding the study, saying that the effects are modest and that the likelihood of a male child being born gay is still small, regardless of whether they have older brothers or not. This website uses cookies.
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Having older brothers increases men's likelihood of being gay

However, the researchers think their findings are linked to what happens in the womb, rather than the effects of growing up among older boys. For decades, academics have argued over nature versus nurture - whether individuals are born gay, or become gay because of where and how they grow up. Now Canadian psychologist Ray Blanchard says the answer depends on how many older brothers a man has. He studied the family backgrounds of gay men and the same number of straight men. All were white and none were twins, he told the journal New Scientist.
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However, there is some science behind the idea. And it seems like researchers are wasting their time with the "older brother is gay" theory. As of late, researchers have been stuck on an idea called the Fraternal Birth Order Effect.

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