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Male fetuses' sex hormones can affect female siblings before they're even born : Shots : vimarsana.com
Male fetuses' sex hormones can affect female siblings before they're even born : Shots : vimarsana.com
Male fetuses' sex hormones can affect female siblings before they're even born : Shots
When siblings share a womb, sex hormones from a male fetus can cause lasting changes in a female littermate. This effect exists for all kinds of mammals — perhaps humans too.
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