Comparison of human choriogonadotropin (HCG) and gonadotropin releasing hormone (GnRH) using a synchronized ovulation program for timed breeding

Authors

  • G. Goodell DUO Dairy, Clinical Research Coordinator, Loveland, CO
  • T. Geary Colorado State University, Dept. of Animal Sciences, Fort Collins, Colorado 80523
  • R. Stevens Colorado State University, Dept. of Clinical Sciences, Fort Collins, Colorado 80523

DOI:

https://doi.org/10.21423/aabppro19985717

Keywords:

Ovsync protocol, human choriogonadotropin, GnRH, pregnancy rates, management, cost-effective

Abstract

As dairies continue to grow in size so must the means of efficient and cost-effective management. In the area of reproduction, the Ovsync program was developed by Pursley, et al. in order to improve pregnancy rates in cattle without the labor cost of heat detection.1 The protocol involves the use of prostaglandin and gonadatropin releasing hormone (GnRH) at specific time intervals to induce ovulation, allowing for a timed breeding.2 While these methods have proven relatively successful, the cost of such a program has been prohibitive. The use of human choriogonadotropin (HCG) in place of GnRH in the Ovsync protocol has been hypothesized to deliver similar results.

Cover image of the 31st Conference Proceedings: A photo of Dr. Eric I. and Mrs. Mary Williams smiling in golden light. Yellow background.

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Published

1998-09-24

Issue

1998

Section

Research Summaries - Dairy I & II