The fraternal birth order effect is the strongest known predictor of sexual orientation; according to several studies, each older brother increases a man's odds of developing a homosexual sexual orientation by 28%--48%.
According to several studies, each older brother increases a man's odds of developing a homosexual sexual orientation by 28%--48%. The fraternal birth order effect is the strongest known predictor of sexual orientation.
The fraternal birth order effect is the strongest known predictor of sexual orientation. According to several studies, each older brother increases a man's odds of developing a homosexual sexual orientation by 28%--48%.
The fraternal birth order effect is the strongest known predictor of sexual orientation. According to several studies, each older brother increases a man's odds of developing a homosexual sexual orientation by 28%--48%.