Comparison of 2 gonadorelin formulations and 2 luteolytic agents on pregnancy rates in beef cattle synchronized with a 5-d CO-Synch + CIDR program

Authors

  • S. Bas Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • T. A. Brick Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • G. Starkey Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • G. Messerschmidt Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • A. A. Barragan Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • G. M. Schuenemann Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210
  • M. L. Day Department of Animal Sciences, The Ohio State University, Columbus, OH 43210

DOI:

https://doi.org/10.21423/aabppro20143749

Keywords:

reproductive performance, beef cattle, Gonadotropin releasing hormone, luteolytic agents, timed artificial insemination, TAI, FDA, dairy cattle, pregnancy rate

Abstract

Improving reproductive performance in beef cattle is paramount to maximize beef operations productivity and sustainability. Gonadotropin releasing hormone (GnRH) and luteolytic agents (dinoprost tromethamine and cloprostenol sodium) are commercially available to be used in synchronization programs to allow timed artificial insemination (TAI) of cattle. Recently, a Synchronization Pack™ (Parnell) containing a combination of cloprostenol sodium and gonadorelin acetate was approved by the Food and Drug Administration to be used in TAI synchronization programs in both beef and dairy cattle. However, little research-based evidence on the pregnancy rates that can be achieved in beef cattle using these hormones is available. The objective of the present study was to compare the effect of 2 gonadorelin formulations and 2 luteolytic agents (PGF) injected as part of a 5 day CO-Synch + CIDR program on fixed TAI (FTAI) pregnancy rates (PR) in beef cattle.

Cover image of the 47th Conference Proceedings: An image of a herd of cattle in a field at dusk. Three cows are standing in the foreground, looking adorable. Yellow background.

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Published

2014-09-18

Issue

2014

Section

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