Jiangtao Lyu1, Wenjie Sun2, Yi Lin1. 1. Department of Reproductive Endocrinology, Chongqing Health Center for Women and Children, Chongqing, People's Republic of China. 2. Department of Reproductive Endocrinology, Chongqing Health Center for Women and Children, Chongqing, People's Republic of China. Electronic address: 837689606@qq.com.