When you think about the health effects of air pollution, what comes to mind? Lung disease? Cancer? One health effect you might not immediately think of is low birth weight, a risk factor for a variety of other health problems later in life. Yet a growing body of evidence indicates that birth weight and other gestational outcomes can be influenced by a mother’s exposure to fine particulate matter air pollution. In this podcast Tracey Woodruff discusses new findings on this link from a global consortium of investigators who, between them, have analyzed more than 3 million births.