Hormonal changes around bovine luteolysis.
Plasma concentrations of estradiol-17beta, progesterone, LH and 13, 14-dihydro-15-keto-PGF2alpha were determined by radioimmunoassay on 2-hourly samples obtained around luteolysis and estrus in three dairy cows. The decline in progesterone occurred before the preestrous rise in estrogen and no pre-estrous peak of progesterone could be detected. The major activity of prostaglandin coincided, with declining progesterone levels and the active stage of estrogen secretion.
D000818:Animals; D002417:Cattle; D003338:Corpus Luteum / Q000502:physiology*; D004958:Estradiol / Q000097:blood*; D004971:Estrus; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D011460:Prostaglandins F / Q000097:blood*; D013997:Time Factors
D011460:Prostaglandins F; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone