Funding for this research was provided by:
national natural science foundation of china (No.81671530, 8207169)
science and technology commission of shanghai municipality (No. 21140904000, 201409005800)
Received: 19 July 2021
Accepted: 1 September 2021
First Online: 9 September 2021
: All participants signed informed consent forms approved by the Shanghai Jiao Tong University Committee on the Use of Human Subjects in Medical Research. Ethical approval of follicular fluid collection was obtained from the institutional Ethics Committee of Ruijin Hospital, Shanghai Jiao Tong University School of Medicine.
: Not applicable.
: The authors declared that they have no competing interests.