1. State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China
2. Department of Histology and Embryology, Nanjing Medical University, Nanjing 211166, China
3. Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou 310058, China
4. Animal Core Facility, Nanjing Medical University, Nanjing 211166, China