from these observations , it appears that 1 ) females with progesterone levels greater than 3000 pg/ml over an extended period are pregnant , 2 ) tursiops truncatus is capable of spontaneous ovulation in captivity without gonadotropin therapy , 3 ) captive female dolphins , although relatively resistant to pmsg , can be induced to ovulate using a combination of high intramuscular-injected doses of pmsg followed by hcg , and 4 ) spontaneous ovulation is likely to follow an induced ovulation .
C0018061
gonadotropin
C0018062
hcg