Zhou, Qiongjie
Dong, Guiying
Wang, Qiaomei
Shen, Haiping
Zhang, Yiping
Zhang, Shikun
Chen, Jingqi
Li, Xiaotian
Article History
Received: 16 September 2023
Accepted: 21 January 2024
First Online: 6 February 2024
Declarations
:
: This project was approved by the Chinese Association of Maternal and Child Health Studies (IRB-201001), and written informed consent was obtained from each participant before enrollment. For those participated couples who were illiterate, their finger print was taken for the informed consent.
: Not applicable.
: All authors declare that they have no competing interests.