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한우 공란우 과배란 처리 후 난소 주기 재개에 관한 연구 KCI 등재

Resumption of Ovarian Cyclicity after Superovulation Treatment to Donor Cow in Hanwoo

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한국동물생명공학회지 (구 한국수정란이식학회지) (Journal of Animal Reproduciton and Biotechnology)
한국동물생명공학회(구 한국수정란이식학회) (Journal of Animal Reproduction & Biotechnology)
초록

The objective of this study was to investigate the effects of abnormal ovarian cycles after superovulation treatment of Hanwoo donors. Thirty six, at random stages of the estrous cycle, received a CIDR. Four days later, the animals were superovulated with a total of 28AU FSH (Antorin, 2AU=1 ml) administered twice daily in constant doses over 4 days. On the 3th administration of FSH, CIDR was withdrawn and 25 mg was administered. Cows were artificially inseminated twice after estrous detection at 12 hr intervals. The cows received GnRH at the time of Ind insemination. Embryos were recovered 7 or 8 days after the 1st insemination. The cows were considered to have resumed ovarian cyclicity on the day of ovulation if followed by regular ovarian cycles. 50.0 percentage of the cows (18/36) had normal resumption of ovarian cyclicity (resumption within 40 days after superovulation), and 50.0% (18/36) had delayed resumption(resumption did not occur until>40 days after superovulation). Delayed resumption Type II (first ovulation did not occur until 40 days after superovulation, i.e. delayed first ovulation 33.3%) were the most common types of delayed resumptions. The mean numbers of total ova from < 10 and 10 of corpora lutea (CL) was 7.3 and 13.9, respectively. The number of transferable embryos differed between < 10 and 10 CL was 4.2 and 5.1, respectively. 11.1 percentage of the cows (4/36) did not resumption their ovarian cyclicity until 60 days after superovulation treatment.

저자
  • 손준규(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 최창용(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 조상래(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 연성흠(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 최선호(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 김남태(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 정진우(농촌진흥청 국립축산과학원 가축유전자원시험장)
  • 김성재(농촌진흥청 국립축산과학원 가축유전자원시험장)