Nurture, Not Nature, Determines Baby’s ‘Macho’ Hormone Levels

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Nurture, Not Nature, Determines Baby’s ‘Macho’ Hormone Levels

Hormones duringِ infancy areِ critical forِ development, withِ testosterone, forِ instance, playing a key role inِ the growth ofِ male reproductive organs.
But whatِ factors influence a baby’s hormone levels haveِ beenِ uncertain.
Though theِ researchers didn’tِ identify anyِ specific environmental factors thatِ influenced hormone levels, specifically testosterone, theyِ were able toِ rule outِ the infant’s genetics byِ studying identical twins.