Reuters: Exposure to air pollution later in pregnancy may raise a woman’s risk of delivering her baby too soon, a new study suggests. The findings, reported in the journal Epidemiology, do not prove that air pollution, per se, triggers preterm labor in some women. But they do provide “limited support” for that theory, the researchers say. Some previous studies have linked air pollution exposure in both the first and third trimester of pregnancy to an increased risk of preterm …