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The storage of oocytes is important for ad-vances in reproductive biology and infertility treat-ment. The cryopreservation of mammlian oocytesis one of the most techniques for gene preservationand producing individuals with a new combinationof genes. Since Whittingham et al.[1]reported thatmouse ova could be successfully cryopreserved,many researchers have attempted to freeze unfertil-ized mammalian oocytes. The microtubular spin-dles of metaphase (M ) oocytes to which thechromosome is attach… 相似文献
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