Clinical and Experimental Reproductive Medicine

  • 제50권1호
  • /
  • Pages.63-68
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  • 2023
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  • 2233-8233(pISSN)
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  • 2233-8241(eISSN)
대한생식의학회 (The Korean Society for Reproductive Medicine)
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The pregnancy outcomes of day-5 poor-quality and day-6 high-quality blastocysts in single blastocyst transfer cycles

  • Guang-li Zhang (Center for Reproductive Medicine, Guangdong Second Provincial General Hospital) ;
  • Tian-yi Sun (Center for Reproductive Medicine, Guangdong Second Provincial General Hospital) ;
  • Sen Li (Center for Reproductive Medicine, Guangdong Second Provincial General Hospital) ;
  • Man-xi Jiang (Center for Reproductive Medicine, Guangdong Second Provincial General Hospital) ;
  • Lei Guo (Center for Reproductive Medicine, Guangdong Second Provincial General Hospital)
  • 투고 : 2022.06.21
  • 심사 : 2022.11.24
  • 발행 : 2023.03.31
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초록

Objective: This study compared the outcomes of single blastocyst transfer cycles, using day- 5 poor-quality blastocysts and day-6 high-quality blastocysts. Methods: We analyzed 462 frozen-thawed embryo transfer (FET) cycles performed at our center from January 2014 to December 2019. The cycles were divided into two groups: a day-5 poor-quality blastocyst transfer group (group A) and a day-6 high-quality blastocyst transfer group (group B). The clinical outcomes were tested. Results: In groups A and B, respectively, the clinical pregnancy rate (CPR; 61.65% vs. 67.17%, p=0.258), implantation rate (IR; 61.65% vs. 67.17%, p=0.258), and live birth rate (LBR; 69.51% vs. 77.83%, p=0.134) showed no significant differences. Moreover, when day-3 embryo quality was considered, the CPR, IR, and LBR were also similar in group A and group B (p>0.05). Conclusion: The clinical outcomes of day-5 poor-quality blastocysts and day-6 high-quality blastocysts were similar, suggesting that the developmental speed of the embryo might be more important than embryo quality for the clinical outcomes of single blastocyst transfer in FET cycles.

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과제정보

This work was supported by the Science Foundation of Guangdong Second Provincial General Hospital (grant no. YY2017-001) and the National Natural Science Foundation of China (grant no. 31801245).

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