Ethical approval and participation consent
This study met the criteria established by the Declaration of Helsinki and was approved by the local ethics committee, the ethics committee of China Resources WISCO General Hospital affiliated to Wuhan University of Science and Technology (registration number HRWGZYY0002). This study was registered with the Chinese Clinical Trial Registry (grant no. ChiCTR2300073766). Participants signed an informed consent form and were informed that the study was designed to promote maternal and fetal health, but were not informed of the primary objectives of the study. The public access link is 