Between the ages of birth and 8, known as the "formative years," the brain and neurobiological development progress the fastest after birth.A child's physical, mental, and future success can all be impacted by what happens during this time. When it comes to determining who a child is and who they will become in the future, the formative years of a child are an important time. They have a long-lasting effect on their minds and healthy growth

References
11. 
Rank MR, Hirschl TA. The Economic Risk of Childhood in America: Estimating the Probability of Poverty across the Formative Years. Journal of Marriage and the Family. Published online November 1999:1058. doi:10.2307/354024

22. 
Stiles J, Jernigan TL. The Basics of Brain Development. Neuropsychol Rev. Published online November 3, 2010:327-348. doi:10.1007/s11065-010-9148-4

3
44. 
Bellis MA, Lowey H, Leckenby N, Hughes K, Harrison D. Adverse childhood experiences: retrospective study to determine their impact on adult health behaviors and health outcomes in a UK population. Journal of Public Health. Published online April 14, 2013:81-91. doi:10.1093/pubmed/fdt038

55. 
Transforming the Workforce for Children Birth Through Age 8. National Academies Press; 2015. doi:10.17226/19401

66. 
Shonkoff JP, Boyce WT, McEwen BS. Neuroscience, Molecular Biology, and the Childhood Roots of Health Disparities. JAMA. Published online June 3, 2009:2252. doi:10.1001/jama.2009.754

77. 
Felitti VJ MD, FACP, Anda RF MD, MS, Nordenberg D MD, et al. Relationship of Childhood Abuse and Household Dysfunction to Many of the Leading Causes of Death in Adults. American Journal of Preventive Medicine. Published online May 1998:245-258. doi:10.1016/s0749-3797(98)00017-8

88. 
Felitti VJ MD, FACP, Anda RF MD, MS, Nordenberg D MD, et al. Relationship of Childhood Abuse and Household Dysfunction to Many of the Leading Causes of Death in Adults. American Journal of Preventive Medicine. Published online May 1998:245-258. doi:10.1016/s0749-3797(98)00017-8