Ovsynch versus Ultrasynch

A Clinical Trial of Breeding Efficiency Utilizing Corpus Luteum Function

Authors

  • J. A. A. McArt Ambulatory and Production Medicine Clinic, Cornell University, Ithaca, NY 14853
  • L. Caixeta Ambulatory and Production Medicine Clinic, Cornell University, Ithaca, NY 14853
  • V. Machado Ambulatory and Production Medicine Clinic, Cornell University, Ithaca, NY 14853
  • C. L. Guard Ambulatory and Production Medicine Clinic, Cornell University, Ithaca, NY 14853
  • R. C. Bicalho Ambulatory and Production Medicine Clinic, Cornell University, Ithaca, NY 14853

DOI:

https://doi.org/10.21423/aabppro20094341

Keywords:

reproductive efficiency, dairy cattle, synchronization, pregnancy rate, hormone treatment, ultrasynch, ovsynch, corpus luteum

Abstract

The steady decrease in reproductive efficiency of dairy cattle and increase in use of synchronization protocols have generated interest in development of a synchronization program that improves pregnancy rate while decreasing the number of hormone treatments. The purpose of this study was to determine if the reproductive efficacy of a synchronization program, ultrasynch, based on functionality of the corpus luteum (CL), was greater than a standard ovsynch protocol.

Cover image of the 42nd Conference Proceedings: Cattle grazing in a spring field along the horizon. In the foreground, one brown cow with a triangle marking and ear tags is posing. Yellow background.

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Published

2009-09-10

Issue

2009

Section

Research Summaries 4

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