Funding for this research was provided by:
Health and Family Planning Commission of Hubei Province (WJ2019H297)
Innovative Research Team of Hubei Provincial Science and Technology Department (No:2019CFA033)
Health and Family Planning Commission of Hubei Province (No: WJ2018h0133)
Received: 19 September 2020
Accepted: 21 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The study conformed to the guidelines explained in the Declaration of Helsinki and was approved by the Ethics Committee of Maternal and Child Health Hospital of Hubei Province ( IEC (XM008)). All included women signed written informed consent for therapeutic procedures and for the publication of those reports.
: Not applicable.
: The author declares that they have no competing interests.