Abstract:ObjectivesAs current studies on the relationships between air pollutants exposure during the first trimester and birth defects were not fully elucidated, this study aimed to assess the association between selected air pollutants and birth defects.DesignAn observational study.ParticipantsWe obtained 70 854 singletons with gestational age <20 weeks who were delivered at a large maternal and child healthcare centre in Wuhan, China.Outcome measuresBirth defects data and daily average concentration of ambient pa… Show more
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