Exposure to high levels of ozone causes mothers in low- and middle-income countries to give birth to infants with a low birth weight. The reduction in O3-related birthweight was greatest in countries in South Asia, the Middle East, and North Africa.

Exposure to high levels of ozone causes mothers in low- and middle-income countries to give birth to infants with a low birth weight. The reduction in O3-related birthweight was greatest in countries in South Asia, the Middle East, and North Africa.