A new study from Spain suggests that exposure to air pollution during pregnancy may influence how a baby’s brain develops. Researchers studied 754 pregnant women and found that those who were exposed to higher levels of pollutants, like nitrogen dioxide and black carbon from traffic, had babies with small changes in brain structure.

Using advanced ultrasounds in the third trimester, scientists noticed that these babies had slightly more fluid in certain brain areas and minor differences in brain development. While these changes are still within the normal range, doctors say more research is needed to understand if they could impact development as the child grows.

Experts stress that this does not mean parents should panic, but it highlights the importance of clean air for pregnant women. Limiting exposure to pollution when possible can help support a healthy pregnancy and developing baby.

SOURCE:

Reuters, June 13, 2025