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The relative location between pbI and nucleus of procine ooctyes (400×). L. The length of the distance between the metaphase plate and the pbI, r. The radius of the porcine oocytes. a Displacement: the length of the distance between the metaphase plate and the pbI was more than 1/3 radius of the oocytes(L > 1/3 r). b Adjacent: the length of the distance between the metaphase plate and the pbI was less than 1/3 radius of the oocytes (L < 1/3 r)
