1. Reproductive Medicine Center, Xiangya Hospital, Central South University , Changsha, China
2. Laboratory of Reproductive and Stem Cell Engineering, National Health and Family Planning Commission , Changsha, China
3. Institute of Reproductive and Stem Cell Engineering, School of Basic Medical Science, Central South University , Changsha, China
4. Reproductive and Genetic Hospital of CITIC-XIANGYA , Changsha, China
5. Clinical Research Center for Reproduction and Genetics in Hunan Province , Changsha, China