Funding for this research was provided by:
National Natural Science Foundation of China (No.81801532)
Text and Data Mining valid from 2020-01-10
Received: 14 October 2019
Accepted: 27 December 2019
First Online: 10 January 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Third AffiliatedHospital of Guangzhou Medical University. Each patient has signed a informed consent on obtaining and analyzing their clinical data prior to the initiation of IVF/ICSI-ET treatment.
: Not applicable.
: The authors declare that they have no competing interests.