Funding for this research was provided by:
Natural Science Foundation of China (81370719, 81671535)
Jiangsu Key Discipline of Human Assisted Reproduction Medicine Foundation (FXK201749)
Jiangsu Provincial Medical Talent of the Project of Invigorating Healthcare through Science, Technology and Education (ZDRCA2016044)
Chinese Medical Association Clinical Medicine Research Reproductive Medicine (17020270696)
Suzhou Science and Technology Development Plan Project (SS2019067)
Received: 28 September 2019
Revised: 18 November 2019
Accepted: 19 December 2019
First Online: 4 February 2020
Ethics approval and consent to participate
: All experimental procedures were performed following the Care and Use of Laboratory Animals established by the National Research Council (National Academy Press Washington, DC, 1996) and were approved by the Institutional Animal Care and Use Committee at the First Affiliated Hospital of Soochow University. The use of human tissue was approved by the Institutional Ethics Committee of the First Affiliated Hospital of Soochow University.
: Not applicable.
: The authors declare that they have no competing interests.