The 2021 Lancet Series on Maternal and Child Undernutrition Progress builds on previous research and provides an evidence-based agenda for how the global health and development community can improve the health and nutrition of today’s generation and all the generations ahead. The 2021 Lancet Series on nutrition presents updated information and builds on the 2008 and 2013 Lancet Series to set forth an evidence-based, global agenda for tackling undernutrition.

These critical 1,000 days lay the foundation for all the days that follow. How mothers and children are nourished and cared for during this time profoundly impacts a child’s physical growth, cognitive development, and lifelong health. Improving women’s and girls’ diets, access to nutrition services, and nutrition counseling – before and during pregnancy and while breastfeeding – are critical to preventing malnutrition among families and communities everywhere.