Acknowledgements
This work was supported by the Research Team of Female Reproductive
Health and Fertility Preservation (SZSM201612065) , National Natural
Science Foundation of China-Youth Foundation (No.81401169), Beijing
Municipal Science & Technology Commission (No. Z191100006619086),
National Key Research and Development Program of China (No.
2016YFC1000201) and The capital health research and development of
special (No. 2018-1-4091). The study funders had no rule in the study
design, implementation, analysis, manuscript, preparation, or decision
to submit this article for publication.