Japan Environment and Children’s Study Group

Per- and polyfluoroalkyl substances (PFAS) are reportedly associated with adverse obstetric outcomes, including premature labor and gestational diabetes. We aimed to evaluate associations of maternal PFAS exposure with obstetric and birth o…

OBJECTIVES: This study aimed to investigate the association and population-attributable fraction (PAF) of maternal smoking and secondhand smoke (SHS) exposure during pregnancy with placental abruption. DESIGN: Prospective cohort study. SE…

BACKGROUND: To our knowledge, the association of maternal exposure to metallic elements with weight trajectory pattern from the neonatal period has not been investigated. OBJECTIVES: The goals of this study were to identify infant growth t…

BACKGROUND: Because of the increased number of diagnosed cases of endometriosis or adenomyosis resulting in infertility, many women require assisted reproductive technology (ART) to become pregnant. However, incidences of obstetric complica…

BACKGROUND: The Japan Environment and Children's Study (JECS) is an ongoing nationwide birth cohort study launched in January 2011. In this progress report, we present data collected in the first year to summarize selected maternal and infa…