A new method, nest culture method, was developed in this study. The culture effects of different methods for embryo culture in vitro were compared. The results showed that whether the suspension in phi35mm dish in nest culture method was covered with mineral oil or not, the developmental rates of embryos had no significant difference. Compared to the nest culture method, the developmental rates of embryos in Brinster's method were significant lower. However, all embryos cultured in the single dish in which the suspensions were not covered with mineral oil were blocked at 2-cell stage. The nest culture method is an effective method for early embryo culture in vitro.
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