• Newborn brain (one third adult size) grows 1% each day immediately following birth but slows to 0.4 % per day by 3 months. Overall growth in the first 90 days was 64% reaching just more than half adult brain volume
  • Birth a week premature resulted in a brain 4% smaller than at term. Still 2% smaller at 3 months
  • Cerebellum size doubled in 90 days

JAMA Neurology 2014  doi:10.1001/jamaneurol.2014.1638