Abstract
In mammals the gene Sox9 plays a preponderant role in the development process of the embryonic gonad male, a fact that is evidenced by the existence of various mechanisms for amplification of Sox9 by a positive feedback loop. The Ptgds, MAP3K1, FGF9 genes and its receptor FGFR2 participate in the process of sustaining male gonadal development pathway, from amplification of Sox9. The vario…