1. Centre for Reproductive Medicine, Affiliated Hospital 1 of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
2. Affiliated Stomatology Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P.R. China
3. College of Physics and Electronic Information Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, P.R. China
4. Department of Histology and Embryology, School of Basic Medical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, P.R. China