Day 3 embryo transfer may have better pregnancy outcomes in younger than 35-year-old patients with poor ovarian response
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To explore the pregnancy outcomes of embryo transfer with D2 or D3 embryos in patients with poor ovarian response.
The pregnancy outcomes of 620 patients who had poor ovarian response and underwent the first in vitro fertilization-embryo transfer (IVF-ET) were retrospectively analyzed. Of the 620 cycles, all available fresh D2 embryos were used in 365 cycles (day 2 embryo transfer) and all available fresh D3 embryos were used in 255 cycles (day 3 embryo transfer) without superfluous embryos for freezing.
There was a significant difference in clinical pregnancy rate between day 2 (32.73 %) and day 3 (50.83 %) embryo transfer in younger than 35-year-old patients, but no significant differences in implantation rate, live birth rate and spontaneous abortion rate (P > 0.05). There were similar pregnancy outcomes between day 2 and 3 embryo transfer in 35-year and older patients.
D3 embryo transfer may have better pregnancy outcomes in younger than 35-year-old patients with poor ovarian response.
KeywordsPoor ovarian response In vitro fertilization Pregnancy outcomes All available embryos
This study was supported by the Innovation Talent Fund for Healthy Science and Technology of Henan Province and the Youth Fund from the First Affiliated Hospital of Zhengzhou University.
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