<prompt> What stimulates the gonads in the male at 8 weeks to secrete testosteroneInhibin from corpus luteumGnRH from hypothalamus of babyPlacental HCGAll of above  <response>: During embryogenesis, In male embryo, at the 6-7 week of gestation, secretion of a first anti-mullerian hormone also ko Mullerian inhibiting substance causes regression of Mullerian duct.Then at 8-12 week, under influence of Placental HCG, testes started producing testosterone. 