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Effects of hCG Administration on AI or Cloned Embryo Transfer of Korean Native Heifers  

최선호 (축산기술연구소)
성환후 (축산기술연구소)
장유민 (축산기술연구소)
최재혁 (축산기술연구소)
임기순 (축산기술연구소)
양병철 (축산기술연구소)
연성흠 (축산기술연구소)
이장희 (축산기술연구소)
류일선 (축산기술연구소)
Publication Information
Journal of Embryo Transfer / v.17, no.3, 2002 , pp. 227-234 More about this Journal
Abstract
This study was performed to investigate the improvement of the pregnancy rate of Al or clone embryo transfer on hCG administration in Korean Native heifer. A total of 42 heifers were treated with control, CIDR(withou E2 capsule). hCG after 7 day of hi, the pregnancy rate were spewed 53, 46, 71%. These results were significant different among the treatments(P<0.05). When the hCG were adminstrated at cloned embryo transfer, pregnanacy rate were control, hCG 5.8%, 10.4% respectively and there was no significant different between treatments. Plasma P4 concentration of hCG treatment in heifers were 3 times higher than control on 13~16 day after heat. After this, plasma P4 concentration of CIDR and hCG treated heifers were kept the 2~3 times levels. IGF-I concentration were showed no differences between pregnancy and non-pregnancy. hOG and CIDR. IGF-II concentration were revealed the differences between pregnancy and non-pregnancy in CIDR group but there was no differences in hCG administration group. Plasma cortisol were high at heat and 16 day after heat and CIDR treated group was higher than the other group. These results suggest that hCG administration was improve the pregnancy rates on Al and cloned ET, accompanying the incline of P4 concentration.
Keywords
Korean Native heifer; hCG; pregnancy; progesterone;
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