title: [Radioimmunoassay of bovine serum progesterone].
abstract: Radioimmunoassay determination of plasma progesterone in the cow without chromatographic purification was developed. The level ranged from 0.6 ng/ml during estrus to 6.4 ng/ml during the luteal phase. The progesterone level declined rapidly 48 to 72 h before estrus beginning.
mesh_terms: D000818:Animals; D002417:Cattle; D002940:Circadian Rhythm; D003338:Corpus Luteum / Q000502:physiology; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011374:Progesterone / Q000097:blood* / Q000302:isolation & purification; D011863:Radioimmunoassay
chemical_list: D011374:Progesterone
vernacular_title: Le dosage radio-immunologique de la progestérone plasmatique chez la vache