Affiliation: | 1. Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan Department of Obstetrics and Gynecology, University of Indonesia, Cipto Mangunkusumo National Hospital, Jakarta, Indonesia;2. Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan;3. Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan Department of Histology and Embryology Division of Prenatal Medicine, University of Bologna, Bologna, Italy;4. Department of Obstetrics and Gynecology, University of Indonesia, Cipto Mangunkusumo National Hospital, Jakarta, Indonesia;5. Department of Obstetrics and Gynecology, Hiroshima University Faculty of Medicine, Hiroshima, Japan |