Study suggests males with older brother more likely to be gay

A team of researchers from the University of Toronto, the Institute of Sexology and Sexual Medicine, Charité – Universitätsmedizin Berlin and the University of Lethbridge has found evidence showing that males with an older brother have a greater chance of being gay than males that do not. In their paper published in the journal Proceedings of the Royal Society B, the group describes their study of data from past research efforts and what the learned from it.

Boys who are left handed and have lots of brothers more likely to be gay, research finds

Men With Older Brothers More Likely To Be Gay? Study Expanding To Biological Origin

兄のいる男性は同性愛者である確率が38％も高いという研究結果 - GIGAZINE

Research confirms men with older brothers are more likely to be gay, suggesting same-sex attraction has a biological basis

Men With Older Brothers More Likely To Be Gay? Study Expanding To Biological Origin

Men With Older Brothers More Likely To Be Gay? Study Expanding To Biological Origin

Fraternal birth order and male sexual orientation - Wikipedia

Research confirms men with older brothers are more likely to be gay, suggesting same-sex attraction has a biological basis

Why younger brothers are more likely to be gay

brother - ベッド/マットレス

Men With Older Brothers More Likely To Be Gay? Study Expanding To Biological Origin

Study suggests males with older brother more likely to be gay