1. Clinical Anatomy & Reproductive Medicine Application Institute, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
2. Department of Obstetrics and Gynecology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, 533300, China
3. Department of Reproductive Medical Center, The Affiliated Hospital of Guilin Medical University, Guilin 541001, China
4. Department of Reproduction and Genetics, The First Affiliated Hospital of Kunming Medical University, Kunming, 650032, China