Air pollution, asthma may contribute to preterm birth risk

Although there were no significant trends regarding preterm birth prior to gestational week 30, the researchers found preterm birth was more common between weeks 34 and 36. http://www.healio.com/allergy-immunology/asthma-lower-airway-diseases/news/online/%7B6e8868ea-322a-4c7a-a5c2-1491c197b32e%7D/air-pollution-asthma-may-contribute-to-preterm-birth-risk

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