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pp.127-137
This experiment was carried out to investigate the factors affecting superovulation in rabbits and to determine the effect of pFSH and PMSG on ovarian superovulatory responses and embryo production, and the effect of superovulation treatment with a single injection of pFSH dissolved in polyvinylpyrrolidone on the ovarian responses and the embryo quality. The results obtained were suonmerized as follows: Superovulatory response resulted in significantly (P<0.05) higher ovulation rates and more embryos in spring or autumn, compared with summer or winter. Repeated superovulatory treatments with PMSG leaded to a significantly(P<0.05) decreased number of total follicles and recovered ova. Superovulation with pFSH resulted in the higher number of ovulated follicles and recovered ova than with PMSG. A single subcutaneous injection of pFSH dissolved in 25% PVP resulted in the more ovulation points(33.2) and recovered embryos(30.2), which were comparable to the multiple injections of pFSH(44.8 vs 37.7).These results indicated that the treatment with a single injection of FSH dissolved in PVP was an efficient and simple alternative method to the conventional multiple FSH injections for superovulation in rabbits.
