Extending the interval from presynch to initiation of ovsynch in a presynch-ovsynch protocol did not reduce fertility of lactating dairy cows not detected in estrus that received timed artificial insemination

Authors

  • M. J. Thomas Dairy Health & Management Services, LLC. Lowville, NY 13367
  • J. O. Giordano Department of Animal Science, Cornell University, Ithaca, NY 14850
  • M. D. Curler Dairy Health & Management Services, LLC. Lowville, NY 13367
  • G. Catucuamba Department of Animal Science, Cornell University, Ithaca, NY 14850
  • R. Wijma Department of Animal Science, Cornell University, Ithaca, NY 14850

DOI:

https://doi.org/10.21423/aabppro20153649

Keywords:

reproductive performance, Presynch, Ovsynch, insemination, dairy cattle, in estrus, TAI

Abstract

Remarkably, no large scale field study has been conducted to evaluate the reproductive performance of cows synchronized with Presynch-Ovsynch with a 12 versus a 14 d interval from Presynch to the beginning of Ovsynch when cows are inseminated in estrus after Presynch. Thus, the specific objective of this study was to determine if increasing the interval between the Presynch and Ovsynch portion of the Presynch-Ovsynch protocol from 12 to 14 d would reduce the fertility of lactating dairy cows not detected in estrus after Presynch and receiving TAI after completing the Ovsynch protocol.

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Published

2015-09-17

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