Funding for this research was provided by:
National Natural Science Foundation of China (81801532)
Guangdong Basic and Applied Basic Research Foundation (2019A1515010755)
Received: 5 January 2021
Accepted: 17 March 2021
First Online: 31 March 2021
: This study was approved by the ethics committee of the Third Affiliated Hospital of Guangzhou Medical University. Each patient has signed informed consent on obtaining and analyzing their clinical data prior to the initiation of IVF/ICSI-ET treatment.
: The author confirms that the work described has not been published before; that its publication has been approved by all co-authors; that its publication has been approved (tacitly or explicitly) by the responsible authorities at the institution where the work is carried out.
: The authors declare that they have no competing interests.