Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Effect of Gonadotropin-releasing Hormone Administration in Repeat-breeder Hanwoo

저수태 한우에 대한 성선자극 호르몬 방출호르몬 투여 효과

  • 임석기 (축산기술연구소 대관령지소) ;
  • 우재석 (축산기술연구소 대관령지소) ;
  • 윤상보 (축산기술연구소 대관령지소) ;
  • 전기준 (축산기술연구소 대관령지소)
  • Published : 1997.04.01
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Abstract

The objective of this study was to enhance the pregnancy rate of repeat-breeder Hanwoo with gonadotropin-releasing hormone(Gn-RH) at the time, dose and site of administration.The results obtained were summaried as fallows:1.Ovulation time and pregnancy rate following GnRH administration time was 46.0, 27.4, 42.0 and 43.2hr and 33.3, 57.1, 37.5 and 40.0% at non-treatment, estus, 1st A' and 2nd Al treatment, respectively.2. Ovulation in repeat-breeder was induced 100% within 24hr with GnRH administration at the time of estrus.3. Ovulation time and pregnancy rate following GnRH adminstration dose and site was 25.2, 32.6, 17.6 and 27.6hr, and 28.6, 42.9, 75.0 and 66.7% at 50$\mu$g+IU, 50$\mu$g+IM, 100$\mu$g+IU and 100$\mu$g+IM treatments, respectively. It is concluded that GnRH administration for repeat-breeder was enhanced the pregnancy rate when treated with 100$\mu$g intrauterine at the time of estrus.

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