During the preimplantation embryo development, we can find many abnormal cells especially in the process of in vitro culture.

早期胚胎发育过程当中伴随着大量的发育异常的细胞，尤其在体外培养过程中更为普遍。

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There is great meaning to explore the mechanism of early embryo development by investigate the apoptosis gene express change during preimplantation embryo development.

对早期胚胎发育过程中凋亡基因表达变化的研究对于揭示早期胚胎发育机制有重要的意义。

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This review summaries current development on the gene expression and control of mammalian preimplantation embryo.

综述近年来哺乳动物胚胎着床前这一发育阶段基因表达与调控的研究进展。

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