Sexual differenciaton by default follows a pathways for development of female internal and external genitalia, requiring no active intervention. Endocrine activity of the testes, production of Androgens by Leydig cells and Mullerian Inhibiting hormone by Sertoli cells, is required for sexual differenciation to be diverted down the male genitalia development pathway.
= Internal Genetalia =
= Internal Genetalia =
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* Male: '''Wolffian Duct''' developes from the '''Mesonephric Duct'''
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* Male: The primitive male reproductive tract '''The Wolffian Duct''' developes from the '''Mesonephric Duct'''
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* Female: '''Mullarian Ducts''' develop from the '''Paramesonephric Duct'''
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* Female: The primitive female reproductive tract '''Mullarian Ducts''' develop from the '''Paramesonephric Duct'''
* This is dependent on appropriate hormonal influence.
* This is dependent on appropriate hormonal influence.