title: Absence of a critical period in estrogen-induced release of LH in the anestrous ewe.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus; D005260:Female; D007031:Hypothalamus / Q000502:physiology; D007457:Iodine Radioisotopes; D007986:Luteinizing Hormone / Q000097:blood*; D011247:Pregnancy; D011863:Radioimmunoassay; D012756:Sheep; D013997:Time Factors
chemical_list: D007457:Iodine Radioisotopes; D004958:Estradiol; D007986:Luteinizing Hormone