Editing Androgen (section)

====Testes formation====
During mammalian development, the gonads are at first capable of becoming either [[ovary|ovaries]] or testes.<ref>{{Cite book  |year=2000 |title=Developmental Biology |publisher=[[Sinauer Associates]] |location=[[Sunderland, Massachusetts]] |edition=6th |isbn=978-0-87893-243-6 |url=https://archive.org/details/developmentalbio00gilb | vauthors = Gilbert SF |url-access=registration }}{{Page needed|date=September 2010}}</ref> In humans, starting at about week 4, the gonadal rudiments are present within the [[intermediate mesoderm]] adjacent to the developing kidneys. At about week 6, epithelial [[sex cords]] develop within the forming testes and incorporate the [[germ cell]]s as they migrate into the gonads. In males, certain [[Y chromosome]] genes, particularly [[SRY]], control development of the male phenotype, including conversion of the early bipotential gonad into testes. In males, the sex cords fully invade the developing gonads.