Production of In-Vivo Embryos by Superovulation and Result of Transfer with Fresh or Frozen Embryos for Hanwoo and Holstein Cattle
Kim, Y.J.;Song, J.W.;Lee, H.R.;Kim, S.H.(Chonbuk National University, Jeonju, Republic of Korea)E-mail:[email protected] | Seo, S.H.(Jeonju-zoo, Jeonju, Republic of Korea) | Jeong, K.N.;Kim, Y.S.;Shin, D.S.;Jo, S.W.(Livestock Development and Research Institute of Chonrabuk-do, Gimje, Republic of Korea)
To investigate the feasibility of embryo transfer technology to promote productivity of cattle, 36 cows(18 Holstein, 18 Hanwoo) were superovulated. Fresh embryos were transferred to 25 recipients(14 Holstein, 11 Hanwoo), whereas frozen embryos were transferred to 17 recipients(10 Holstein, 7 Hanwoo). Two embryos were transferred at a time to 13 recipients(9 Holstein, 4 Hanwoo) to produce twin calves. 1. 75.0% of donor cattle were reacted to hormonal treatment for superovulation. 2. The rate of embryo recovery by non-surgical method for Holstein and Hanwoo was 90.4 and 95.8% in comparison with numbers of corpus luteum.
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