A 41-year-old member asked:

can you tell me about woman is the default in fetuses, sexual differentiation opts for female sex?

1 doctor answer • 1 doctor weighed in

Dr. Wayne Ingram answered

Specializes in Obstetrics and Gynecology

Inducer substance: The inducer substance is only active if a Y chromosome is present at the time of embryo development when it causes differentiation into a male child. Without it, the "default menu" always "boots" to female.

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Last updated Jul 7, 2014

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