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There are a number of genes involved in this stage of bipotential gonadal determination; '''WT-1''', '''SF-1''', '''Lim-1''' and '''EMx-2'''. The development of either the Mullerian duct is caused by the genes '''SRY''', '''SOX-9''', '''DMRT''' and '''1/2'''. The Wolfian ducts

There are a number of genes involved in this stage of bipotential gonadal determination; '''WT-1''', '''SF-1''', '''Lim-1''' and '''EMx-2'''. The development of either the Wolfian ducts is caused by the genes '''SRY''', '''SOX-9''', '''DMRT''' and '''1/2'''. The Mullerian ducts develop as a result of the genes '''DAX-1''' and '''Wnt-4'''.

===Pimary Sexual Differentiation Phase===

===Pimary Sexual Differentiation Phase===