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Field Evaluation of Milk Progesterone Kits for Determination of Pregnancy in Dairy Cows

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Title: Field Evaluation of Milk Progesterone Kits for Determination of Pregnancy in Dairy Cows
Author: Fisher, G. R.; Tedmer, D. A.; Teynolds, L. P.; Kirsch, J. D.
Description: The concentration of progesterone, a hormone, in milk can help determine if a cow is pregnant. Tests could take 2 hours to several days to determine progesterone levels. This article covers a study where three commercially available kits results were compared to the standard RIA analysis of actual progesterone concentrations. Results showed that milk progesterone concentrations for those cows not pregnant were less than those of pregnant cows. Plasma progesterone levels were less in those cows that were not pregnant. ELISA kits were quite accurate in the diagnosing of pregnancy status on 21 days after breeding. This was in agreement with the standard qualitative RIA procedures. The ELISA test can be useful in checking the accuracy of estrus detection. Factors affecting the accuracy of the tests were briefly discussed.
Date: 1989
Subject:
Permalink: http://hdl.handle.net/10365/6279

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