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Effect of OPU (Ovum Pick-Up) Duration on the Rate of Collected Ova and In Vitro Produced Blastocyst Formation  

Jin, Jong-In (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Kwon, Tae-Hyeon (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Choi, Byeong-Hyun (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Kim, Sung-Soo (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Jo, Hyun-Tae (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Kong, Il-Keun (Department of Animal Science, Division of Applied Life Science (BK21 Program), Graduate School of Gyeongsang National University)
Publication Information
Journal of Embryo Transfer / v.25, no.1, 2010 , pp. 15-20 More about this Journal
Abstract
This study was performed to identify the optimal timing for oocyte donor replacement during OPU procedure. OPU was carried out to collect oocytes from every donor at an interval of $3{\sim}4$ days (2 times a week). The collected oocytes were matured in vitro in TCM-199 supplemented with 10% FBS, 10 mg/ml of FSH and 1 mg/ml of estradiol for 24 h. After 24 h of exposure to sperm, the presumptive zygotes were cultured in CR1aa medium supplemented with 4 mg/ml of BSA for 3 days before being changed to CR1aa medium with 10% of FBS for another $3{\sim}4$ days. The mean numbers of retrieved oocytes were remained constantly up to 3 months ($6.0{\pm}0.5$, $6.2{\pm}0.7$, $5.2{\pm}0.6$), but significantly decreased at over 4 to 6 months ($3.7{\pm}0.5$, $2.8{\pm}0.4$, $1.2{\pm}0.2$) (p<0.05). The blastocyst development potential was also very similar rate from 1 to 3 months (37.2%, 40.4% and 44.6%), but significantly decreased from 4 to 6 months (24.8%, 29.3% and 28.6%, respectively) (p<0.05). The production of OPU derived embryos in periods of 1 to 3 months ($2.2{\pm}0.3$, $2.5{\pm}0.3$ and $2.3{\pm}0.4$) were significantly higher than those in 4 to 6 months ($0.9{\pm}0.2$, $0.8{\pm}0.2$ and $0.3{\pm}0.2$, respectively) (p<0.05). In conclusion, the efficient periods for the production of OPU derived embryos was until 4 months, twice per week to produce over 64 transferable embryos and then replace new donor after 3 months use. The best replacement time is 3 months and could be maximized production of OPU derived embryos.
Keywords
OPU; duration; bovine; oocyte; blastocyst;
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Times Cited By KSCI : 2  (Citation Analysis)
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