这个词是什么意思？
The transfer of mammalian embryos from an in vivo or in vitro environment to a suitable host to improve pregnancy or gestational outcome in human or animal. In human fertility treatment programs, preimplantation embryos ranging from the 4-cell stage to the blastocyst stage are transferred to the uterine cavity between 3-5 days after FERTILIZATION IN VITRO.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D004624 · MeSH 2026。
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