Treated at anaphase of second meiosis, two female pronuclei and one male pronucleus of the fertilized eggs became abnormal during their fusion and separation procedure.

• 受精卵在第2次减数分裂的后期时接受处理，可使部分受精卵的两个雌性原核和一个雄性原核在融合和分离过程中发生异常。