Harron K, Verfuerden M, Ibiebele I, et al. - Utilizing administrative hospital data capturing 3,002,749 singleton births surviving to postnatal discharge between 2010 and 2014 (2008‐2012 for Sweden), researchers ascertained if the increased risk of adverse infant outcomes among teenage mothers differs by country, reflecting different national teenage birth rates and country‐specific social/welfare policies, in Scotland (higher teenage pregnancy rates), England, New South Wales (NSW; Australia), Ontario (Canada), and Sweden (lower rates). They measured preterm birth (24‐36 weeks’ gestation), mortality within 12 months of postnatal discharge, unplanned hospital admissions, and emergency department visits within 12 months of postnatal discharge, for infants born to mothers aged 15‐19, 20‐24, 25‐29, and 30‐34 years. The risk of adverse outcomes among teenage mothers was higher in all countries compared with births to women aged 30-34 years, but the magnitude of effects was not linked to country-specific rates of teenage births. Infants born to teenage mothers, regardless of country, had universally worse results than those born to older mothers. Such excess risk did not vary for teenage mothers by national rates of livebirths. Current mechanisms to support teenage mothers have not eliminated maternal age-related inequalities in infant outcomes; additional strategies to mitigate excess risk in all countries are required.