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|標題:||Surgical oocyte retrieval and the developmental potential of the oocytes derived from prepubertal calves||作者:||Yeh, S.P.
|關鍵字:||oocyte;gonadotropin;calf;surgical retrieval;in-vitro maturation;matured bovine oocytes;calf oocytes;gonadotropin;stimulation;follicular aspiration;embryo production;fertilization;competence;activation;juvenile||Project:||Asian-Australasian Journal of Animal Sciences||期刊/報告no：:||Asian-Australasian Journal of Animal Sciences, Volume 17, Issue 2, Page(s) 174-178.||摘要:||
The objectives of this study were to investigate the ovarian responsiveness of juvenile calves to exogenous gonadotropin treatments and to establish the oocyte retrieval technique for prepubertal heifers. Three 78-day-old calves were treated with 4 doses (40, 30, 30 and 30 mg) of FSH (Folltropin V) at 12 h interval up to 229 day-old. Surgical oocyte retrieval was performed 24 h after the last injection of FSH. Calves with good ovarian responses to FSH treatment had an average ovarian size of 5x3 cm compared to 3x2 cm in the less-responsive animals. Large variations were observed in the number of total follicles (51 45), aspirated follicles (39 +/- 36), oocytes recovered (23 +/- 25) and usable oocytes recovered (11 +/- 19) during 78 to 229 day-old. Oocytes derived from prepubertal calves had significantly lower maturation rate than those from cows (34 vs. 100%, p<0.05). Mean diameters of calf oocytes (144 +/- 1 μm) and ooplasm (110 +/- 1 μm) were significantly lower than those of cows (149 +/- 1 and 125 +/- 1 μm, respectively). The diameter of the ooplasm also increased significantly after in vitro maturation (IVM) (108 +/- 1 vs. 112 +/- 1 μm). However, further studies are required to optimize the IVP system for the oocytes derived from prepubertal heifers.
|Appears in Collections:||動物科學系|
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