<Tr> <Th_colspan="2"> Development of the gonads </Th> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The development of the gonads is part of the prenatal development of the reproductive system and ultimately forms the testes in males and the ovaries in females . The gonads initially develop from the mesothelial layer of the peritoneum . </P>

When do the gonads develop in an embryo