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. Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
4. Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
5. National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China