Momoko Inoue1,2, Kazuhiro Kajiwara2, Osamu Samura2, Hidenori Akutsu1, Haruhiko Sago3, Akihiro Umezawa1, Aikou Okamoto2
(1. Department of Reproductive Biology, National Research Institute for Child Health and Development, Tokyo, Japan, 2. Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan, 3. Maternal-Fetal, Neonatal and Reproductive Medicine, National Research Institute for Child Health and Development, Tokyo, Japan)