In this issue of Clinics in Perinatology, guest editors Drs. Heather C. Kaplan and Munish Gupta bring their considerable expertise to the topic of Quality Improvement. In recent years, the growing use of quality improvement (QI) methods to apply evidence-based practices to clinical care has resulted in a greater penetration of QI methods in neonatal intensive care units across the world and a more sophisticated appreciation of how best to use them. This issue provides important updates in these areas as well as looks at the future of QI in perinatology. Contains 15 practice-oriented topics including frameworks for quality improvement: Lean Six Sigma and the model for improvement in perinatology; sustaining improvement in perinatology; recent progress in global health quality improvement in perinatology; measuring equity for quality improvement in perinatology; pursuing equity for all mothers and newborns through population health: the role of perinatal quality collaboratives; and more.  Provides in-depth clinical reviews on quality improvement in perinatology, offering actionable insights for clinical practice.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field. Authors synthesize and distill the latest research and practice guidelines to create clinically significant, topic-based reviews.