NAGASAKI Sumito^{1, 2}, TAKANO Mayumi¹, SAKUMA Junya², HAYASHI Rika¹, NAKATA Masahiko¹, MORITA Mineto¹ (1.Obstetrics and Gynecology, Toho University Omori Medical Center, 2.Obstetrics and Gynecology, Toho University Graduate School of Medicine)

MAEKAWA Ryo, SHINAGAWA Masahiro, SHIRAHURA Yuichiro, MIHARA Yumiko, MURATA Susumu, MATSUURA Masami, MATSUMOTO Keiko (Obstetrics and Gynecology, Yamaguchi University Graduate School of Medicine)

TAKI Akane¹, OYAMA Rika¹, YAMAMOTO Yuka³, KAWATAKI Motoyoshi⁴, YAMAGUCHI Satoru² (1.Clinical Laboratory, Yamaguchi Women's Hospital, 2.Obstetrics and Gynecology, Yamaguchi Women's Hospital, 3.Obstetrics and Gynecology, Juntendo University School of Medicine, 4.Neonatoogy, Kanagawa Children's Medical Center)

HARADA Takashi, ARATA Kazuya, TSUNETO Takako, TANIGUCHI Fuminori, HARADA Tasuku (Obstetrics and Gynecology, Tottori University)

SHINAGAWA Masahiro¹, MURATA Susumu¹, SHIRAFUTA Yuichiro¹, MIHARA Yumiko¹, MAEKAWA Ryo¹, MATSUMOTO Keiko², MATSUURA Masami², SUGINO Norihiro¹ (1.Obstetrics and Gynecology, Yamaguchi University, 2.Nursing Department, Yamaguchi University)