Effect of morphological grading on pregnancy outcome of single frozen embryo transfer

  • Yi Guo
  • Xiao Sun
  • Man Wang
  • Xin Zhang
  • Liying LiuEmail author
Letter to Editor


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Center of Reproductive MedicineShenyang Women’s and Children’s HospitalShenyangChina
  2. 2.Shenyang Women’s and Children’s HospitalShenyangChina

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