How older siblings may shape sexual orientation via mother’s immune system
It has long been observed that men with older brothers are more likely to be gay, but an association has also been found with older sisters. This sheds further light on how a mother's immune system may be involved in shaping sexual orientation
It has long been observed that men with older brothers are more likely to be gay, but an association has also been found with older sisters. This sheds further light on how a mother's immune system may be involved in shaping sexual orientation
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