Li, Shiguang
Tan, Huifang
Fu, Huimin
Du, Juan
Liu, Peihao
Qin, Yingying
Article History
Received: 15 February 2023
Accepted: 5 December 2023
First Online: 12 December 2023
Declarations
:
: The study was conducted according to the Declaration of Helsinki (as revised in 2013) and approved by the Institutional Review Board of the Center for Reproductive Medicine, Shandong University. (96990) Informed consent was waived by the Institutional Review Board for this study due to its retrospective nature and the use of an anonymous database.
: None.
: The authors declare no competing interests.