Funding for this research was provided by:
National Natural Science Foundation of China (81501294, 91846302)
Received: 18 May 2021
Accepted: 25 November 2021
First Online: 1 December 2021
: The study was approved by both Suzhou Municipal Hospital Reproductive Medicine Ethics Committee and the Ethics Committee of Institutes of Biomedical Sciences. Since the data were analyzed anonymously, the filter paper was obtained from a standard screening procedure, and the TcB measurement was a completely noninvasive routine clinical assessment, both committees approved a waiver of publication consent.
: Not applicable.
: The authors declare that they have no competing interests.