1. Center for Reproductive Medicine, Shandong University, Jinan, Shandong, China
2. Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
3. Reproductive Medicine Center of Zibo Maternal and Child Health Care Hospital, Zibo, Shandong, China
4. Reproductive Medicine Center of The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
5. Linyi People's Hospital, Linyi, Shandong, China
6. Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
7. Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
8. Research Unit of Gametogenesis and Health of ART-Offspring, Chinese Academy of Medical Sciences, China
9. Shandong Key Laboratory of Reproductive Medicine, Shandong First Medical University, Jinan, Shandong, China