title: Radioimmunoassay of androstenedione and testosterone in cow plasma at the time of luteolysis and oestrus.
abstract: Androsteredione and testosterone were measured by radioimmunoassay after chromatography on micro-columns of Lipidex-5000 in jugular plasma samples taken every 2-3 h at the time of luteolysis and oestrus in 3 dairy cows. The concentrations of androstenedione and testosterone varied between 5 and 60 pg/ml and 5 and 80 pg/ml respectively and no consistent pattern in the fluctuations of either steroid was observed.
mesh_terms: D000735:Androstenedione / Q000097:blood*; D000818:Animals; D002417:Cattle / Q000097:blood*; D003338:Corpus Luteum / Q000502:physiology*; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011374:Progesterone / Q000097:blood; D011863:Radioimmunoassay; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D000735:Androstenedione; D011374:Progesterone