title: Comparison of commercial progesterone assays for evaluation of luteal status in dairy cows.
abstract: Serum progesterone (P4) concentration was measured using 2 methods, and ovaries were examined by ultrasonography (US) to determine the presence of a corpus luteum (CL) in 101 lactating dairy cows. The concordance correlation coefficient between the 2 methods (Ovucheck and Immulite P4 assays) was high (ρc = 0.94); agreement between the assays on presence of a CL based on P4 > 1 ng/mL was excellent (Kappa = 0.88) and of each assay with US was good (Kappa = 0.63 for each).
authors.affiliation: Biovet, Saint-Hyacinthe, Quebec J2S 8W2 (Broes); Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1 (LeBlanc).
authors.forename: André
authors.initials: A
authors.lastname: Broes
authors.affiliation: Biovet, Saint-Hyacinthe, Quebec J2S 8W2 (Broes); Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1 (LeBlanc).
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: LeBlanc
mesh_terms: D000818:Animals; D002417:Cattle / Q000097:blood*; D003338:Corpus Luteum / Q000000981:diagnostic imaging / Q000378:metabolism*; D005260:Female; D007124:Immunoenzyme Techniques / Q000379:methods / Q000662:veterinary*; D011374:Progesterone / Q000097:blood*; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000379:methods / Q000662:veterinary*; D014463:Ultrasonography
chemical_list: D011374:Progesterone