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Milk progesterone concentration and production in superovulated Holstein cows


, : Milk progesterone concentration and production in superovulated Holstein cows. Journal of Dairy Science 65(11): 2164-2169

Six Holstein cows in a commercial herd (three superovulated and three controls) and eight Holstein cows superovulated a total of 12 times in an experimental herd were studied. Superovulation was induced primarily by treatment with follicle stimulating hormone and prostaglandin F2 alpha. Milk was weighed twice daily for 30 days following treatment in the commercial herd with no effect on production. Milk samples were saved on Monday, Wednesday, and Friday to determine progesterone content. Last milk at mid-cycle averaged 8.2 ng/ml of progesterone for the cows in the experimental herd, and 7 days after superovulation they averaged 52.6 +/- 10.2 ng/ml (mean +/- standard error) of progesterone. The correlation with number of embryos recovered was .86. Therefore, milk progesterone may be useful in monitoring superovulatory response. Also, injection of prostaglandin F2 alpha into superovulated cows 9 days after a previous injection did not initiate a new estrous cycle, a fact accurately monitored by milk progesterone determinations.

US$19.90

PMID: 6818264

DOI: 10.3168/jds.S0022-0302(82)82476-4


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Charmley, E.; Veira, D.M., 1988: The effect of inhibiting plant proteolysis on the composition of silage nitrogen and its digestion by sheep. Four silages were made from lucerne herbage not treated or heated to decrease protease activity. Two of the herbage samples were ensiled directly without (unwilted, control) or with steam treatment (unwilted, heated). The steam was passed for 1 mi...

Hastings, E.G.; Peterson, E.H., 1940: The deterioration of the bovine udder in the absence of streptococci. The fore milk of the individual quarters of 11 Holstein cows milked by machine was studied during the first 3 lactation periods. The % of Cl and catalase increased in each lactation period and from period to period, reaching levels usually conside...

Gehlbach, B.K.; Geppert, E., 2004: The pulmonary manifestations of left heart failure. Determining whether a patient's symptoms are the result of heart or lung disease requires an understanding of the influence of pulmonary venous hypertension on lung function. Herein, we describe the effects of acute and chronic elevations of...

Alicino, R.; Bianchi, G., 1960: Considerations on excessive fetal weight. Rivista D'ostetricia E Ginecologia Pratica 42: 930-946

Han, J-Yeong.; Theil, K.S.; Hoeltge, G., 2006: Frequencies and characterization of cytogenetically unrelated clones in various hematologic malignancies: seven years of experiences in a single institution. Cytogenetically unrelated clones are uncommon findings in hematologic disorders. In the present study, among the 1,110 various hematologic malignancies analyzed during the past seven years, 27 (2.4%) patients had karyotypically unrelated clones: 3...

Greene, T., 2009: Randomized and observational studies in nephrology: how strong is the evidence?. The strength of the evidence that can be obtained from observational studies and randomized clinical trials (RCTs) has been widely discussed. This report critically examines 2 perspectives of this discussion in the setting of clinical studies in n...

Gonzalez Donoso J.M.; Linares D.; Rodriguez P.; Serrano F., 1978: Origin of globorotalia margaritae. G. margaritae Bolli and Bermudez, which is usually thought to derive from the group of G. scitula Brady, shows an ambiguous transition within the G. dalii Perconig-G. mediterranea Catalano and Sprovieri group. G. margaritae Bolli and Bermudez may...

Frandsen, P.A.; Frimodt-Møller, P.C.; Poulsen, I.M., 1980: External urinary collection with Urihesive and Uridrop. Ugeskrift for Laeger 142(13): 825-826

Casten, D.F., 1967: Functional anatomy of the groin area as related to the classification and treatment of groin hernias. American Journal of Surgery 114(6): 894-899

Selvi, F.; Bigazzi, M., 2000: Removal of Anchusa macedonica from Anchusa (Boraginaceae): Evidence from phenetics and karyotypic analysis. Anchusa macedonica is a rare species endemic to the historical region of Macedonia, where, since its description by A. Degen and I. Dorfler in 1897, it has been collected from only a few localities. The phenotypic distinctiveness of this poorly-kn...