Emi KONDO, Ryosuke TAJIRI, Yasuyuki KINJO, Eiji SHIBATA, Kiyoshi YOSHINO (Department of Obstetrics and Gynecology, University of Occupational and Environmental Health University of Occupational and Environmental Health)

Keiichi KUMASAWA¹, Risa MIYATAKE¹, Tatsuya FUJII², Naoya AKIBA¹, Taiki SAMEJIMA¹, mari ICHINOSE¹, Masatake TOSHIITSU¹, Takahiro SEYAMA¹, Takayuki IRIYAMA¹, Yutaka OSUGA¹ (1.Department Obstetrics and Gynecology, Tokyo University, 2.Department of Maternal-Fetal Biology, National Center for Child Health and Development)

Munetoshi AKAZAWA, Kazunori HASHIMOTO (Obstetrics and Gynaecology, Adachi Medical Center)

Hikari KOTAKI¹, Makiko SHIMABUKURO¹, Mayumi TAKANO¹, Sumito NAGASAKI¹, Ejiro HAYATA¹, Hitoshi YODA², Masaiko NAKATA¹ (1.Obstetrics and Gynecologyics, Toho University Omori Medical Center, 2.Neonatology, Toho University Omori medical Center)

Keita WAKI¹, Ryuta MIYAKE¹, Kyohei NISHIKAWA¹, Tomoka MAEHANA¹, Kaho YAMAO¹, Shunsuke OHNISHI², Sumire SUGIMOTO¹, Mayuko ICHIKAWA¹, Juria AKASAKA¹, Fuminori KIMURA¹ (1.Department of Obstetrics and Gynecology, Nara Medical University, 2.Department of Obstetrics and Gynecology, Osaka Gyoumeikan Hospital)

Hajime OTA, Takashi YOSHIMASU, Ryohei DOHI, Tomono SHIMABUKURO, Kazushi KOJIMA, Jyunichi NISHIJIMA, Kanako TAKIMOTO, Yoshiyuki FUKUSHI, Shinichiro WADA (Department of Obstetrics and Gynecology, Teine Keijinkai Hospital)

Keisuke AKITA, Yoshifumi KASUGA, Junko TAMAI, Asuka HAMURO, Yuka FUKUMA, Yuya TANAKA, Keita HASEGAWA, Toshimitsu OTANI, Satoru IKENOUE, Mamoru TANAKA (Department of Obstetrics and Gynecology, Keio University School of Medicine)