Effect of oestrus synchronisation through ovulation delay by vaccination against foot-and-mouth disease in Hanwoo (Bos taurus coreanae) cows

Daehyun Kim, Woo Sung Kwon, Jaejung Ha, Jaejo Kim, Danil Kim, Wonyou Lee, Joonho Moon, Junkoo Yi

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: In Korean cattle, after foot-and-mouth disease (FMD) vaccination, anovulation increases, acute immune response is stimulated. Objective: Here, we aimed to improve the fertility rate by ovulation delay caused by the foot-and-mouth disease vaccine. Methods: 160 cows (control, FMD, FMD+Gn250 and FMD+Gn500 groups, with 40 cows each) were used. We analysed the ovulation delay, ovulation rate, conception rate and acute-phase immune responses. Results: In the group vaccinated only with FMD, the average follicle size was maintained at 12 mm and ovulation was delayed. The ovulation rate of the FMD+Gn500 group (500 μg gonadotropin-releasing hormone (GnRH) injections 3 days after the FMD vaccination) was the highest at 81.8%. The ovulation rate of the FMD+Gn250 group (250 μg GnRH injections 3 days after FMD vaccination) was 54.5%, and that of the control group (not FMD vaccinated) was 53.3%. The conception rate was 52.5% (19/40) in the control group, 37.5% (15/40) in the FMD+Gn250 group, and 67.5% (27/40) in the FMD+Gn500 group. Analysis of acute-phase immune response revealed that the plasma contents of haptoglobin and serum amyloid A increased up to 7 days after vaccination against FMD in all the experimental groups, except the control group. Conclusions: We concluded that ovulation delay can be employed to improve conception rate after FMD vaccination through a modified ovulation synchronisation method with GnRH.

Original languageEnglish
Pages (from-to)974-981
Number of pages8
JournalVeterinary Medicine and Science
Volume9
Issue number2
DOIs
StatePublished - Mar 2023

Keywords

  • conception rate
  • foot-and-mouth disease vaccine
  • gonadotropin-releasing hormone
  • Hanwoo (Bos taurus coreanae) cow
  • ovulation delay

Fingerprint

Dive into the research topics of 'Effect of oestrus synchronisation through ovulation delay by vaccination against foot-and-mouth disease in Hanwoo (Bos taurus coreanae) cows'. Together they form a unique fingerprint.

Cite this