About Kurakazu Masamitsu
About Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
About Umehara Nagayoshi
About Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
About Nagata Chie
About Division of Education for Clinical Research, National Center for Child Health and Development, Tokyo, Japan
About Yamashita Yoko
About Division of Obstetric Anesthesia, National Center for Child Health and Development, Tokyo, Japan
About Sato Masaki
About Division of Obstetric Anesthesia, National Center for Child Health and Development, Tokyo, Japan
About Sago Haruhiko
About Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
About Journal of Obstetrics and Gynaecology Research
About Natural Childbirth
About instrumental delivery
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About combined spinal-epidural analgesia
About delivery mode
About labor analgesia
About meconium-stained amniotic fluid
About neonatal cardiopulmonary resuscitation
About Local anesthesia
About Clinical gynecology and obstetrics in general
About 自然分娩
About 脊髄硬膜
About 併用
About 分娩様式
About 母体
About 新生児転帰
About 日本
About 施設
About 観察
About 研究