Document is current

Article History

Received: 12 October 2022

Accepted: 8 May 2023

First Online: 18 May 2023

Declarations

:

: This study was performed in line with the principles of the Declaration of Helsinki. This study was confirmed by the ethics review board of the Department of Obstetrics, Hengshui People’s Hospital with a full ethical code (2020–0041-25).

: All the women were asked to read and sign the consent form.

: None.