Air pollution linked to risk spontaneous preterm birth risk | Image Credit: © hramovnick – © hramovnick – stock.adobe.com.
The odds of spontaneous preterm birth (sPTB) are increased among women exposed to fine particulate matter (PM2.5) and certain PM2.5 constituents, according to a recent study presented at the 2025 American College of Obstetrics & Gynecology Annual Clinical & Scientific Meeting in Minneapolis, Minnesota, from May 16 to May 18, 2025.1
Assessing PM2.5 exposures
Prior data have linked maternal PM2.5 exposure to preterm birth, but this data did not differentiate between sPTB and iatrogenic preterm birth. Therefore, investigators conducted a retrospective cohort study to determine the association between total PM2.5 and PM2.5 constituent exposure with sPTB.
Data on singleton live births between 2008 and…