<prompt> What stimulates the gonads in male at 8 week to secret testosterone -Inhibin from corpus luteumGnRH from hypothalamus of babyPlacental HCGAll of above  <response>: Ans. is c i.e., Placental HCG During embryogenesis, In male embryo, at 6-7 week of gestatin, secretion of 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 staed producing testosterone. 