Table 2.
Fifteen developmental periods of the human brain as defined by Kang et al.
| Period | Description | Age range |
|---|---|---|
| 1 | Embryonic | 4–8 PCW |
| 2 | Early fetal | 8–10 PCW |
| 3 | Early fetal | 10–13 PCW |
| 4 | Early mid-fetal | 13–16 PCW |
| 5 | Early mid-fetal | 16–19 PCW |
| 6 | Late mid-fetal | 19–24 PCW |
| 7 | Late fetal | 24–18 PCW |
| 8 | Neonatal and early infancy | Birth to 6 M |
| 9 | Late infancy | 6 M–1 Y |
| 10 | Early childhood | 1–6 Y |
| 11 | Middle and late childhood | 6–12 Y |
| 12 | Adolescence | 12–20 Y |
| 13 | Young adulthood | 20–40 Y |
| 14 | Middle adulthood | 40–60 Y |
| 15 | Late adulthood | 60+ Y |
M months, PCW post-conception weeks, Y years