Zhang, Haibin
Li, Lihui
Wang, Huiyan
Wei, Chunna
Zhang, Zhen
Funding for this research was provided by:
Shijiazhuang Health Bureau (20251121)
Article History
Received: 22 November 2025
Accepted: 16 February 2026
First Online: 24 February 2026
Declarations
:
: This study was conducted in accordance with the ethical principles of the World Medical Association’s Declaration of Helsinki. The study protocol was reviewed and approved by the Ethics Committee of Shijiazhuang Obstetrics and Gynecology Hospital. Due to the retrospective nature of the study, the requirement for informed consent was waived by the ethics committee. Ethics approval No.: 20240048.
: Not applicable.
: The authors declare no competing interests.