1. Center for Reproductive Medicine, Shandong University , Jinan, China
2. Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University , Jinan, China
3. Shandong Key Laboratory of Reproductive Medicine , Jinan, China
4. Shandong Provincial Clinical Research Center for Reproductive Health , Jinan, China
5. Shandong Technology Innovation Center for Reproductive Health , Jinan, China
6. National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University , Jinan, China