Sexual Differentiation

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An illustrated introduction to the multi-step process of sexual differentiation (becoming male or female within the womb). There are key 'branch points' during embryonic and fetal life that shape a baby's sexual chemistry and anatomy. Chromosomal sex comes first, at the moment of conception, while the formation of gonads (ovaries or testes), internal ducts, and external genitals, and the changes that occur at puberty, all follow in a 'cascade' of cause and effect.