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Effect of Collection Time in Oocyte Recovery from Superovulated Korea Native Goats  

Park, H.-S. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Jung, S.-Y. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Kim, T.-S. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Lee, M.-Y. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Jin, J.-I. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Hong, S.-P. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Lee, J.-S. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Kim, C.-H. (Department of Animal Science & Biotechnology & RAIRC, Jinju National University)
Publication Information
Journal of Embryo Transfer / v.19, no.2, 2004 , pp. 113-119 More about this Journal
Abstract
The purpose of the present study was to examine whether collection time affects results of oocyte recovery from superovulated goats. Fiftyty-one mature Korean native goats, maintained in a pen under natural day length and fed hay ad libitum, were pretreated with progestagen impregnated CIDR for 10 days and then the goats were divided into two groups. One group of the goats received a single intramuscular injection of 1,000 IU PMSG on Day 8 of CIDR insertion. The other group of the goats received twice daily intramuscular injections of a total of 70 mg FSH for 3 days from Day 8 of CIDR. All the gonadotropin treated goats were injected with 10 mg $PGF_{2\alpha}$ on Day 8 and 400 IU hCG in the afternoon on Day 10. For oocyte recovery, donor goats were fasted 24 h before operation. Anesthesia was induced by intravenous injection of 2% xylazine(0.2 mg/kg body weight) and ketamin(11 mg/kg body weight). In vivo oocytes were recovered by follicle aspiration or oviduct flushing at 29 to 34, 35 to 40 and 41 to 50 h after hCG injection through mid-ventral incision. There was no significant difference in the mean number of CL and oocytes recovered. Oocyte collection at 29 to 40 h after hCG increased(P<0.05) the recovery rate of ovulated oocytes in oviducts compared to 41 to 50 h. The same results were also observed in the recovery of follicular oocytes. Oocyte grade was not affected by collection time. When oocytes were collected from follicular oocytes at 41 to 50 h after hCG, the recovery rate of Grade II oocytes was the lowest(P<0.05). From these results, it is suggested that oocyte recovery at 35 to 40 h after hCG will be successful for further use.
Keywords
superovulation; CIDR; oocyte; follicle; oviduct; goat;
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Times Cited By KSCI : 1  (Citation Analysis)
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