Hormonal requirements for the survival of blastocyts in the uterus of the rat.
D000818:Animals; D002369:Castration; D010064:Embryo Implantation; D004967:Estrogens / Q000502:physiology*; D004970:Estrone / Q000494:pharmacology*; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000494:pharmacology*; D051381:Rats; D014599:Uterus / Q000502:physiology*
D004967:Estrogens; D004970:Estrone; D011374:Progesterone