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Estrogen in the First Six Weeks of Pregnancy May Set a Baby Boy's Brain Size at Birth

Prenatal estrogen brain development research: two studies in Early Human Development find that first-trimester maternal ...
Science Daily

Your fingers may hold a secret of human brain evolution

A study of 225 newborns suggests prenatal estrogen may have played a role in the evolution of larger human brains. Boys with finger-length patterns linked to higher estrogen exposure before birth ...