Figure 1.

A timeline of human brain development during the prenatal (in post-conception weeks, pcw) and postnatal (in years) periods. The shaded horizontal bars represent the approximate timing of key neurobiological processes and developmental milestones. The vertical dashed lines define the different age groups. E: embryonic stage; F: fetal development; I: infancy; C: childhood (early childhood and late childhood); A: adolescence; Ad: adulthood; EP: early prenatal; E-M and L-M: early-mid and late-mid prenatal; LP: late prenatal. The blue vertical arrow indicates birth. Gross anatomical features and the relative size of the brain at different stages are illustrated at the top (Figure created with the help of BioRender, www.biorender.com, accessed on 1 November 2023).