Fetal biparietal diameter as a potential risk factor for prolonged second stage of labor: A retrospective observational cohort study

• Satoshi Shinohara ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: shinohara617@gmail.com

  Affiliation Department of Obstetrics and Gynecology, National Hospital Organization Kofu National Hospital, Kofu, Yamanashi, Japan

  http://orcid.org/0000-0003-3124-1141

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• Atsuhito Amemiya,

  Roles Supervision, Writing – review & editing

  Affiliation Department of Obstetrics and Gynecology, National Hospital Organization Kofu National Hospital, Kofu, Yamanashi, Japan

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• Motoi Takizawa,

  Roles Data curation, Supervision, Writing – review & editing

  Affiliation Department of Obstetrics and Gynecology, National Hospital Organization Kofu National Hospital, Kofu, Yamanashi, Japan

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• Kohta Suzuki

  Roles Formal analysis, Supervision, Writing – review & editing

  Affiliation Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan

  http://orcid.org/0000-0002-8151-6927

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