Time trend analysis of perinatal mortality, stillbirth, and early neonatal mortality of multiple pregnancies for each gestational week from the year 2000 to 2019: A population-based study in Japan

• Eijiro Hayata,

  Roles Conceptualization, Data curation, Formal analysis, Methodology, Writing – original draft

  Affiliation Department of Obstetrics and Gynecology, Toho University School of Medicine, Tokyo, Japan

  ⨯
• Masahiko Nakata ,

  Roles Formal analysis, Supervision, Writing – review & editing

  * E-mail: masahiko.nakata@med.toho-u.ac.jp

  Affiliation Department of Obstetrics and Gynecology, Toho University School of Medicine, Tokyo, Japan

  https://orcid.org/0000-0002-3621-1251

  ⨯
• Mineto Morita

  Roles Supervision, Writing – review & editing

  Affiliation Department of Obstetrics and Gynecology, Toho University School of Medicine, Tokyo, Japan

  ⨯