title: A new concept: control of early pregnancy by steroid hormones originating in the preimplantation embryo.
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000378:metabolism; D006063:Chorionic Gonadotropin / Q000378:metabolism; D000242:Cyclic AMP / Q000378:metabolism; D010064:Embryo Implantation; D004622:Embryo, Mammalian / Q000502:physiology*; D004625:Embryo, Nonmammalian; D047108:Embryonic Development; D004967:Estrogens / Q000502:physiology; D005260:Female; D006913:Hydroxysteroid Dehydrogenases / Q000378:metabolism; D007986:Luteinizing Hormone / Q000378:metabolism; D009594:Nitromifene / Q000494:pharmacology; D009696:Nucleic Acids / Q000378:metabolism; D011247:Pregnancy; D011270:Pregnancy, Animal; D011375:Progesterone Reductase / Q000378:metabolism; D011453:Prostaglandins / Q000378:metabolism; D013256:Steroids / Q000378:metabolism*
chemical_list: D006063:Chorionic Gonadotropin; D004967:Estrogens; D009696:Nucleic Acids; D011453:Prostaglandins; D013256:Steroids; D009594:Nitromifene; D007986:Luteinizing Hormone; D000242:Cyclic AMP; D006913:Hydroxysteroid Dehydrogenases; D011375:Progesterone Reductase