Prenatal exposure

Breathing Smog While Pregnant May Worsen Asthma in Offspring

Exposure to air pollution while in the womb might harm the lung-function development of children with asthma, a new study finds.The study showed that exposure to airborne particles and the pollutant nitrogen dioxide during the first and second trimesters was associated with poorer lung function growth in both boys and girls with asthma.The findings add to existing evidence that a mother's exposure to air pollution during pregnancy can have long-term effects on lung-function development in children with asthma