Zhao, Yingge
Lian, Fang
Xiang, Shan
Yu, Yi
Pang, Conghui
Qiu, Yue
Article History
Received: 13 April 2021
Accepted: 24 September 2021
First Online: 27 October 2021
Declarations
:
: This retrospective study was approved by the Institutional Review Board and the Institutional Ethics Committee of the Reproductive Medical Center at the affiliated Hospital of Shandong University of traditional Chinese medicine (Research Ethics Committee reference number: 2021–16). All procedures were carried out per the relevant guidelines and regulations. Furthermore, informed consent was obtained from all participants before the study.
: Not applicable.
: The authors declare no competing interests.