Influence of oestrogen on the loss of the zona pellucida in the rat.
D000818:Animals; D002369:Castration; D004958:Estradiol / Q000494:pharmacology* / Q000502:physiology*; D005260:Female; D010053:Ovary / Q000601:surgery; D010063:Ovum / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000494:pharmacology*; D051381:Rats
D011374:Progesterone; D004958:Estradiol