Why Do We Focus on the Prenatal-to-3 Age Period? Understanding the Importance of the Earliest Years

The human brain grows most rapidly in the first three years of life, and an individual’s health and well-being during that period has lifelong consequences. This document provides a comprehensive, easy-to-read overview of the science of the developing child, and what it means for parents, caregivers, and society to ensure children get a strong and equitable start.