title: Role of estrogen as initiator of daily LH surges in the ovariectomized rat.
mesh_terms: D000818:Animals; D002369:Castration; D002404:Catheterization; D002940:Circadian Rhythm; D004958:Estradiol / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D010053:Ovary / Q000502:physiology; D010424:Pentobarbital / Q000494:pharmacology; D011863:Radioimmunoassay; D051381:Rats; D013997:Time Factors
chemical_list: D004958:Estradiol; D007986:Luteinizing Hormone; D010424:Pentobarbital