A new Belgian study has found that population smoking bans (including prohibiting smoking in public places, restaurants and bars serving food) have reduced the risk of preterm births. The study of more than 600 000 babies born between 2002 to 2011 found that the the risk of preterm births fell by 3.1% after the ban on smoking in restaurants in 2007, and a further 2.7% after the 2010 ban on smoking in bars serving food. There was no trend in a reduction in preterm births prior to the bans coming into effect. The study supports evidence showing the benefits of avoiding passive smoking, particularly during pregnancy. Read more about the study here.