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自1983年澳大利亚Trouson等通过冻融胚胎移植(frozen-thawed embryo transfer,FET)获得首例临床妊娠,此后该技术逐步广泛应用,大量IVF周期剩余胚胎被冷冻保存,提高了IVF
The first clinical pregnancy was obtained from a frozen-thawed embryo transfer (FET) by Trouson et al. (1983) in Australia. Since then, the technology has been widely used and the remaining embryos in a large number of IVF cycles have been cryopreserved to improve IVF