Competing Interests: We declare no competing interests. The WHO guideline development panel that formulated the antenatal corticosteroids and tocolytics recommendations was an independent, international panel of experts convened by WHO. The panel was co-chaired by GLD and ZPQ. JPV was project manager, and RB and OTO were project coordinators for WHO ACTION-I trial. JPV, RB, and OTO did not take part in the formulation of the recommendations. We would like to acknowledge that this Comment was updated by the Department of Sexual and Reproductive Health and Research and the Department of Maternal, Newborn, Child and Adolescent Health and Ageing at WHO in Geneva. WHO acknowledges the contributions of the many individuals and organisations to the development of these recommendations, including systematic reviewers, members of the Guideline Development Group, and other collaborators.