The analysis, published September 28, 2021, in PLOS Medicine, is the most in-depth look yet at how air pollution affects several key indicators of pregnancy, including gestational age at birth, reduction in birth weight, low birth weight, and preterm birth. And it is the first global burden of disease study of these indicators to include the effects of indoor air pollution, mostly from cook stoves, which accounted for two-thirds of the measured effects.

A growing body of evidence points to air pollution as a major cause of preterm birth and low birthweight. Preterm birth is the leading cause of neonatal mortality worldwide, affecting more than 15 million infants every year. Children with low birthweight or who are born premature have higher rates of major illness throughout their lives.

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