Every year, millions of babies begin life far earlier than expected, entering the world with fragile bodies and uncertain futures. World Prematurity Day brings global attention to these early arrivals, highlighting the challenges they face and the incredible strength of their families. This comprehensive guide explores the causes of preterm birth, the latest medical advances, the emotional and social impact on parents, and what the world is doing to improve outcomes. Whether you’re a parent, health professional, or advocate, this article offers everything you need to know in one place.