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Live birth rate per patient by embryo transfer using fertility preservation embryos. In each age group, patients undergo two or more embryo transfers, and patients under 38 years of age have a greater than 50% of obtaining a live birth. Furthermore, in the age group of 38 to 40 years, when the live birth rate per embryo transfer decreases markedly, by increasing the number of embryo transfers, the decrease in success rate was offset, and a live birth rate of 42% was achieved.
