Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden. Department of Traditional Chinese Medicine (TCM), Peking University Third Hospital, Beijing, China. Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Peking University Third Hospital, Beijing, China. Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China. Department of Neurobiology, Care Sciences and Society, Division of Physiotherapy, Karolinska Institutet, Huddinge, Sweden. Department of Endocrinology and Metabolism, Peking University Third Hospital, Beijing, China. Institute of Sports Medicine, Peking University Third Hospital, Beijing, China. Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, Beijing, China. Department of Obstetrics and Gynecology, Karolinska Institutet, Stockholm, Sweden.