TERADA Shuhei, MURAKOSHI Takeshi, IGA Kentaro, KATO Keiichiro, KATO Airi, SOGA Eri, KONNO Hiroko, SUZUKI Takashi, MATSUSHITA Mitsuru (Department of Perinatology, Seirei Hamamatus General Hospital)

TAGUCHI Chisato^{1, 3}, KAWATAKI Motoyoshi², ISHIKAWA Hiroshi³ (1.Ultra sound laboratory, Sugawara OBGY Hospital, 2.Neonatology, Kanagawa Children Medical Center, 3.Obstetrics and Gynecology, Kanagawa Children Medical Center)

SUEMITSU Tokumasa¹, TAJIMA Atsushi¹, SUZUKI Makoto¹, KONDO Atsushi² (1.Obstetrics and Gynecology, Kameda Medical Center, 2.Neonatology NICU, Kameda Medical Center)

MIYOSHI Takekazu, INAMURA Noboru, YASUKOCHI Satoshi, HORIGOME Hitoshi, YODA Hitoshi, TAKETAZU Mio, NII Masaki, SAGO Haruhiko, MAENO Yasuki, IKEDA Tomoaki (Japan Fetal Arrhythmia Group)

TSURITANI Mitsuhiro, KONISHI Tae, HORIUCHI Chinami, NEKI Reiko, YOSHIMATSU Jun (Perinatology and Gynecology, National Cerebral and Cardiovascular Center)