determination of gonadal weight , seminiferous canalicule diameter , thickness of ovarian cortex and medulla , as well as of gonadal cell counts in 20-day chicken embryos exposed to gonadotropin ( fsh and lh ) or tsh at 15 days of pre-hatching life has shown that the examined hormones were able to evoke gonadal response also prenatally .
C0018061
gonadotropin
C0018067
gonadal