Fraternal birth order and male sexual orientation - Wikipedia - Gay chance
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A correlation between fraternal birth order and male sexual orientation has been suggested by . Thus, if a male with no older brothers has a 2% chance of being homosexual and the fraternal birth order effect males; the effect of older brothers did not alter the likelihood of being gay in left-handed and ambidextrous men. Science, not statistics, draws a connection between male homosexuality and having older brothers, due to a mother's antibodies fighting a.