CB能抑制卵母细胞激活后第二极体排出，从而提高原核的形成率。
CB can increase the two pronuclei formation rate of oocytes by inhibiting the extrusion of second polar body.
结果表明海狸鼠卵母细胞与其它啮齿动物的卵母细胞一样，能够在体外培养成熟，完成第一次减数分裂，排出第一极体。
The results indicated that nutria oocytes, like other rodent oocytes, can be matured in vitro, complete first meiotic division and discharge first polar body.
卵丘-卵母细胞复合物各组的卵母细胞生殖泡破裂发生率和第一极体排除率明显高于裸卵各组（P<0.05）。
Percentage of undergoing germinal vesical breakdown and PB1 extrusion in cumulus-oocyte complex groups was higher than that in denuded oocyte groups(P<0.05).
卵丘-卵母细胞复合物各组的卵母细胞生殖泡破裂发生率和第一极体排除率明显高于裸卵各组（P<0.05）。
Percentage of undergoing germinal vesical breakdown and PB1 extrusion in cumulus-oocyte complex groups was higher than that in denuded oocyte groups(P<0.05).
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