Article Text

PDF
Fertility parameters of dairy cows with cystic ovarian disease after treatment with gonadotrophin-releasing hormone
  1. G. A. Hooijer, DVM1,
  2. M. A. A. J. van Oijen, MScAg2,
  3. K. Frankena, MScAg, PhD2 and
  4. M. M. H. Valks, DVM3
  1. 1 Veterinary Practice Mid-Fryslan, Lange Miente 5, 8491 BG, Akkrum, The Netherlands
  2. 2 Wageningen University, Wageningen Institute of Animal Sciences, Marijkeweg 40, Postbus 338, 6700 AH, Wageningen, The Netherlands
  3. 3 Intervet International BV, Wim de Korverstraat 35, 5831 AN, Boxmeer, The Netherlands

Abstract

Fertility data were collected every four weeks for 10 years from 40 herds of Holstein-Friesian dairy cattle. The data collected during 925 lactations from cows with cystic ovarian disease which were treated with 500 μg gonadorelin were compared with data from a control group of 13,869 normal lactations. The intervals between parturition and first insemination and between parturition and conception were significantly shorter (P<0.001) in the normal cows, but the interval between first insemination and conception was not. The overall conception rate tended to be higher (P<0.10) in the normal cows, but the conception rate after the first insemination was significantly higher (P<0.001) and the number of services per conception was significantly lower (P=0.008) in the normal cows.

    Statistics from Altmetric.com

      Request permissions

      If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.