NAKAMURA Takayoshi, HASEGAWA Juniti, MIURA Ayako, KURASAKI Akiko, HONMA Tika, SASAKI Takamichi, MIMA Yasuyuki, IGARASI Suguru, KONNDOU Haruhiro, SUZUKI Nao (Obstetrics and Gynecology, St. Marianna University School of Medicine Hospital)

SOGA Eri, MURAKOSHI Takeshi, IGA Kentaro, KATO Keiichiro, KATO Airi, TERADA Shuhei, KONNO Hiroko, MATSUSHITA Mitsuru, SUZUKI Takashi (Obstetrics and Gynecology, Seirei Hamamatsu General Hospital)

NAGATA Noriko, HASEGAWA Yuri, MIYASHITA Noriko, HIGASHIJIMA Ai, SHIMADA Takako, YAMASAKI Kentaro, MIYAMOTO Masahi, YOSHIMURA Shuichiro, MIURA Kiyonori, MASUSAKI Hideaki (Obstetrics and Gynecology, Nagasaki University)

TAMARU Shunsuke¹, SUGIBAYASHI Rika², YAMAGUCHI Tetsu¹, TAKANO Natsuko¹, NAKAGAMI Hiroko¹, WADA Seiji², ISHIHARA Osamu¹, SAGO Haruhiko², KAMEI Yoshimasa¹ (1.Department of Obstetrics and Gynecology, Saitama Medical University, 2.Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development)

SAITO Mizue, TOKUNAKA Mayumi, GOTO Minako, TAKITA Hiroko, ARAKAKI Tatsuya, OBA Tomohiro, NAKAMURA Masamitsu, MATSUOKA Ryu, SEKIZAWA Akihiko (Department of Obstetrics and Gynecology, Showa University)