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Authors
Zhang, Yongqing
Fu, Tiantian
Chen, Luping
Ouyang, Yinluan
Han, Xiujun
Chen, Danqing https://orcid.org/0000-0002-0201-7215
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Article History
Received: 9 July 2023
Accepted: 28 January 2024
First Online: 9 April 2024
Declarations
:
: All authors have no conflicts of interest to disclose.
: Our study was planned in accordance with the Declaration of Helsinki. Ethical approval was obtained from the Local Ethics Committee of the Women’s hospital, school of medicine, Zhejiang university (<i>Ethical No.</i><i>IRB-20210211-R</i>).
: Yes.
: As this was a retrospective study, written informed consents were not obtained, but all patients’ records/information were anonymized before analysis. The images used in this paper (Figs. , , ) were given informed consent by the pregnant woman.
: This article does not contain any studies with animals performed by any of the authors.
