SOX9 and TDF are also believed to be responsible for many of the later processes of testis development (such as Leydig cell differentiation, sex cord formation, and formation of testis-specific vasculature), although exact mechanisms remain unclear.
SOX9 e TDF crese tamén que son responsables de moitos dos procesos posteriores do desenvolvemento testicular (como a diferenciación das células de Leydig, formación do cordón sexual e formación da vasculatura específica do testículo), aínda que os mecanismos exactos seguen sen estar claros.