Summary:
- The article discusses a study that examined the association between exposure to fine particulate matter (PM2.5) and the risk of preterm birth in the United States.
- The study found that higher levels of PM2.5 exposure during pregnancy were associated with an increased risk of preterm birth, with the strongest association observed during the first trimester.
- The findings suggest that reducing exposure to PM2.5 during pregnancy may help prevent preterm births, which are a leading cause of infant mortality and morbidity.