Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Reproductive Performance of Holstein Cattle Treated with Progesterone and Combination of Progesterone and Estradiol

인공수정 후 외인성 Progesterone과 Estradiol 병용 투여 및 Progesterone 단독 투여가 젖소의 번식 성적에 미치는 영향

  • Baek, K.S. (National Institute of Animal Science, R.D.A.) ;
  • Lee, W.S. (National Institute of Animal Science, R.D.A.) ;
  • Son, J.K. (National Institute of Animal Science, R.D.A.) ;
  • Park, S.B. (National Institute of Animal Science, R.D.A.) ;
  • Park, S.J. (National Institute of Animal Science, R.D.A.) ;
  • Kim, H.S. (National Institute of Animal Science, R.D.A.) ;
  • Lee, H.J. (National Institute of Animal Science, R.D.A.) ;
  • Kang, S.J. (National Institute of Animal Science, R.D.A.) ;
  • Jeong, G.Y. (National Institute of Animal Science, R.D.A.) ;
  • Jeon, B.S. (National Institute of Animal Science, R.D.A.) ;
  • Ahn, B.S. (National Institute of Animal Science, R.D.A.)
  • 백광수 (농촌진흥청 축산과학원 낙농과) ;
  • 이왕식 (농촌진흥청 축산과학원 낙농과) ;
  • 손준규 (농촌진흥청 축산과학원 낙농과) ;
  • 박수봉 (농촌진흥청 축산과학원 낙농과) ;
  • 박성재 (농촌진흥청 축산과학원 낙농과) ;
  • 김현섭 (농촌진흥청 축산과학원 낙농과) ;
  • 이현준 (농촌진흥청 축산과학원 낙농과) ;
  • 강석진 (농촌진흥청 축산과학원 낙농과) ;
  • 정경용 (농촌진흥청 축산과학원 낙농과) ;
  • 전병순 (농촌진흥청 축산과학원 낙농과) ;
  • 안병석 (농촌진흥청 축산과학원 낙농과)
  • Published : 2007.06.30
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Abstract

This study was carried out to investigate the effects of hormones (progesterone, and combination of progesterone and estradiol) on the reproductive performance of dairy cattle. The intravaginal CIDR was inserted in the vagina of cow on day 14 post-insemination to stimulate progesterone secretion with and without estradiol. The CIDR was removed on the day of next expected estrus. The cows for control group were not treated with CIDR or hormones. Conception rate, estrus interval, estrus intensity and serum progesterone were measured. Conception rates in control, CIDR without estradiol and CIDR treated cows were 15.4, 38.9 and 60%, respectively. Estrus interval in cows treated with CIDR was 26.5 days compared with 37.1 and 48.5 days in control and CIDR without estradiol treated cows. Estrus signs were more intense in cows treated with CIDR compared with control and CIDR without estradiol treated cows. Pregnant cows treated with CIDR showed higher serum progesterone concentration than pregnant and non-pregnant cows in control group. Particularly, serum progesterone was significantly higher in CIDR treated pregnant cows compared to non-pregnant cows at days 1, 2 and 6 of gestation. It may be concluded from present results that CIDR treatment is better than CIDR without estradiol to improve conception rate in dairy cattle.

본 연구는 젖소에 있어서 인공수정 후 외인성 progesterone과 estradiol을 병용 투여하거나 progesterone을 단독 투여하는 경우에 젖소의 번식 성적에 미치는 영향을 조사하기 위하여 대조군, CIDR에서 estradiol 캡슐을 부착시킨 progesterone과 estradiol 병용 투여군(P4+E2군) 및 CIDR에서 estradiol 캡슐을 제거한 progesterone 단독 투여군(P4군)로 구분하여, 인공수정 후 14일째에 질내에 삽입한 후 삽입한 날로부터 7일째에 제거하였다. 수태된 개체에 대해서는 수태율을 분석하였고, 수태되지 않은 개체에 대해서는 수정 후 수태까지의 일수, 수태당종부 횟수, 수태가 되지 않은 경우의 차기 발정에 따른 발정강도 및 CIDR 삽입 기간 동안 및 제거한 후의 혈중 progesterone 농도를 조사하여 다음과 같은 결과를 얻었다. 1. P4+E2군 및 P4군에 따른 수태율에 있어서는 대조군의 경우 15.4%였고, P4+E2군의 경우 60.0% 및 P4군 38.9%로 P4+E2군의 수태율이 가장 높은 경향을 나타내었다. 2. 혈청 중 P4 농도 측정을 위하여 처리 후 0일째(발정 주기 14일째), 2일째(발정 주기 15일째), 3일째(발정주기 17일째), 6일째(발정 주기 20일째), 8일째(발정 주기 1일째), 9일째(발정 주기 2일째), 10일째(발정 주기 3일째), 13일째(발정 주기 6일째)에 채혈하여 측정한 결과, 처리 후 8일째(발정주기 1일째), 9일째(발정주기 2일째) 및 13일째 (발정 주기 6일째)에는 P4+E2군이 대조군 비임신군 및 대조군 임신군에 비하여 유의적으로 높은 경향을 나타내었다.(p<0.05).

Keywords

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