1. Key Laboratory of Animal Resistance Research, College of Life Science, Shandong Normal University Ji’nan Shandong China
2. Department of Gynecology and Obstetrics Ji’nan Maternity and Child Care Hospital Ji’nan Shandong China
3. Shandong Vocational Animal Science and Veterinary College Weifang Shandong China
4. Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University Shanghai China
5. Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics Shanghai China