Gay older brothers

CNN If you're a guy with an older brother, there's an increased chance you're gay. Clarification: A previous version of this story referred to higher concentrations of the protein instead of higher concentrations of antibodies to the proteins when describing the findings of the study. More Videos The science of sexuality Story highlights Scientists say mothers who have more than one boy had higher concentrations of a certain protein Earlier studies have noticed that gay men often have older brothers. Scientists have noticed this pattern in previous research, but now they think they have a biological explanation as to why, and it starts long before birth.
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5 Ways Having A Gay Brother Taught Me That Love Is Love, And Made Me A Better Person

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5 Ways Having A Gay Brother Taught Me That Love Is Love, And Made Me A Better Person

The more older brothers a man has, the more likely he is to be gay. Those are the results of two new studies, which provide stronger evidence for a phenomenon known as the fraternal birth order effect. Another line, which originated in England in the s, indicated that homosexual men have an excess of older siblings. I was dimly aware of this work but I put no stock in it, until I inadvertently replicated these findings while doing something completely unrelated.
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What does gay look like? Science keeps trying to figure that out

December 12, Groundbreaking research led by a team from Brock University has further confirmed that sexual orientation for men is likely determined in the womb. In the first-ever laboratory study of mothers of gay men, the research was prompted by more than two decades of statistical data examining the 'older brother effect' which shows that biological older brothers—but not older sisters—increase the odds of homosexuality in later-born males. Brock Health Sciences Professor Tony Bogaert, lead researcher on the project, said the new study has produced some of the most significant findings in men's sexual orientation research in the past 10 or 15 years.
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By Hannah Frishberg. Researchers analyzed 10 separate studies on sexual orientation, involving a total of 5, men and information regarding their birth order. The findings also showed that t he more older brothers a man had, the higher the likelihood he would be gay.
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