Funding for this research was provided by:
Health science and Technology plan projects of Yunnan Province (2017NS214, 2017NS215, 2017NS216, 2018NS0235, 2018NS0236)
Provincial innovation team project of human assisted reproductive technology research (2017HC009)
Martin expert workstation (2018IC106)
YNWFamous doctors of ‘ten thousand people plan’ in Yunnan Province (YNWR-MY-2018-014)
Yunnan reproductive genetic disease clinical medical center (ZX2019-01-01)
National Natural Science Foundation of China (31700798)
Received: 3 June 2020
Accepted: 9 February 2021
First Online: 1 March 2021
Ethics approval and consent to participate
: This study was conducted with approval from the Ethics Committee of the First People's Hospital of Yunnan Province and Dehong Dai and Jingpo Autonomous Prefecture Hospital. This study was conducted in accordance with the declaration of Helsinki. Ethics committee ruled that informed consent was not required in this study. Don’t required any administrative permissions to access and use the medical records described in my study.
: Not applicable.
: The authors declare that they have no competing interests.