Calculating Reproductive Indices

(Recommendations of the American Association of Bovine Practitioners)

Authors

  • John Fetrow Department of Food Animal and Equine Medicine, North Carolina State University, Raleigh, NC 27606
  • Robert Harman Herd Technology, Chino, CA 91710
  • Leon Weaver Veterinary Medical Teaching and Research Center, University of California at Davis, Tulare, CA 93274
  • Wayne Etherington Department of Population Medicine, Ontario Veterinary College, University of Guelph, Ontario, Canada N1G 2W1
  • Donald Klingborg Merced, CA 95340
  • Norman Williamson Department of Large Animal Clinical Science, University of Minnesota, St. Paul, MN 55108
  • David McClary Lilly Research Laboratory, Greenfield, IN 42140
  • Ken Butcher Dairy Records Processing Center at Raleigh, Raleigh, NC 27695
  • Erich Studer Carnation, WA 98014
  • James Ehrlich Dairy Veterinarians Group, Argyle, NY 12809
  • Walt Guterbock Ontario, CA 91764
  • Jeffrey Reneau Department of Animal Science, University of Minnesota, St. Paul, MN 55108

DOI:

https://doi.org/10.21423/aabppro19887084

Keywords:

reproductive performance, basic indices, estrus detection, pregnancy losses

Abstract

This paper presents the report of a committee of the American Association of Bovine Practitioners recommending methods for calculating several basic indices of reproductive performance on dairy farms. Indices for several major analytic areas are presented: overall reproductive performance, estrus detection intensity, conception efficiency, pregnancy losses, reproductive culling, and also reproductive efficiency in herds using a bull.

Cover image of the Proceedings of the 21st Annual Convention: Cover image is a photo of cattle grazing alongside a river with pine trees and a mountain range in the background. Journal title is written in the upper left corner and conference information in the lower right.

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Published

1988-09-28

Issue

1988

Section

Research Summaries