Pregnancy & Air Pollution: Premature Birth Risk
Exposure to air pollution during pregnancy significantly heightens the risk of premature birth. A new Emory University study reveals how fine particulate matter (PM2.5) disrupts maternal metabolism, leading to increased instances of preterm labor. Researchers pinpointed specific molecules,including cortexolone and lysoPE(20:3),and pathways impacting protein digestion as key factors in this dangerous connection. This crucial research analyzed blood samples from over 300 pregnant women in Atlanta, and the results are alarming. Understanding the mechanisms through which pollution affects birth outcomes is vital for developing effective interventions. Premature birth is the leading cause of death for children under five. News Directory 3 keeps you informed on critical health risks. Discover what interventions are in the works.
Air Pollution During Pregnancy Linked to Premature Birth Risk
Updated June 3, 2025
Exposure to fine particulate matter in air pollution during pregnancy can disrupt a mother’s metabolism and increase the risk of premature birth, according to a new Emory University study. The research, published in Environmental Science & Technology, analyzed blood samples from 330 pregnant women in the Atlanta metropolitan area.
Donghai Liang, associate professor of environmental health at Emory’s Rollins School of Public Health and the study’s lead author, said the research identified specific pathways and fine particles that contribute to adverse birth outcomes. Understanding these mechanisms is crucial for developing effective interventions, Liang said.
Previous studies have established that pregnant women are notably vulnerable to PM2.5, which comes from vehicle exhaust, industrial processes, and wildfires. Exposure increases the likelihood of preterm births, defined as less then 37 weeks of gestation. Preterm birth is the leading cause of death worldwide for children under five and can lead to cerebral palsy and respiratory distress syndrome.
The Emory study found that 20% of the participants delivered preterm babies, and 16.4% delivered early term babies (37–39 weeks), rates higher than the U.S. average. Researchers identified cortexolone and lysoPE(20:3) as potential factors linking air pollution and early births. they also noted disruptions in protein digestion and absorption, vital for fetal development, as potential targets for prevention.
“The link between air pollution and premature birth has been well established, but for the first time we were able to look at the detailed pathway and specific fine particles to identify how they are reflected in the increased risk of adverse birth outcomes,” Liang said.
What’s next
Liang emphasized that air pollution is unlikely to disappear soon, and its harmful effects persist even at lower levels. future research will focus on targeting specific molecules affected by pollution to develop clinical interventions that reduce adverse health effects.