Hainan Provincial Key Laboratory for Human Reproductive Medicine and Genetic Research The First Affiliated Hospital of Hainan Medical University Hainan Medical University Haikou Hainan 570102 China;
Department of Reproductive Medicine The First Affiliated Hospital of Hainan Medical University Hainan Medical University Haikou Hainan 570102 China;
Hainan Provincial Key Laboratory for Human Reproductive Medicine and Genetic Research The First Affiliated Hospital of Hainan Medical University Hainan Medical University Haikou Hainan 570102 China;
Hainan Provincial Key Laboratory for Human Reproductive Medicine and Genetic Research The First Affiliated Hospital of Hainan Medical University Hainan Medical University Haikou Hainan 570102 China;
Hainan Provincial Key Laboratory for Human Reproductive Medicine and Genetic Research The First Affiliated Hospital of Hainan Medical University Hainan Medical University Haikou Hainan 570102 China;
In vitro fertilization-embryo transfer; (IVF-ET); Fertilization time; Human chorionic gonadotropin; (HCG);