Prenatal exposure to ambient air pollution and fetal growth trajectories in Wuhan, China

Our study provided evidence of negative associations between air pollution exposure during 1-16 weeks gestation and fast growth trajectory group. In addition, we observed distinct lagged associations between air pollution and fetal growth, with early-pregnancy exposure negatively related to early and mid-gestational growth, and mid-to-late pregnancy exposure negatively related to growth in the late window. These results underscore the importance of identifying critical windows of susceptibility during pregnancy and support early intervention strategies to mitigate adverse fetal developmental outcomes. https://doi.org/10.1289/EHP15204.