![](https://www.heart.org/-/media/Images/News/2023/February-2023/0214AirPollutionHeartDefects_SC.jpg?h=600&w=800&hash=4B3D3C4415B850B860A3C3606D5000A7)
Mom's exposure to air pollution, even before pregnancy, may raise baby's heart defect risk
Feb 14, 2023
Maternal exposure to air pollution prior to pregnancy may be just as likely to increase the risk for heart defects in the unborn child as exposure during the first trimester, a study in China found.