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Comparison of three estrus detection systems during summer in a large commercial dairy herd



Comparison of three estrus detection systems during summer in a large commercial dairy herd



Animal Reproduction Science 87(1-2): 59-72



The objective of the study was to compare three systems for estrus detection and combinations of these systems on a large commercial dairy (1075 lactating cows) during stress of summer heat. At 37-45 days in milk (DIM), 255 cows were fitted with a HeatWatchReg. device (HW; DDx Inc., Denver, CO), an activity sensor ALPROReg. (ALPRO; DeLaval Inc., Kansas City, MO), and visually observed (VO) three times daily.

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Accession: 004083506

Download citation: RISBibTeXText

PMID: 15885441

DOI: 10.1016/j.anireprosci.2004.10.003


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