Scientific studies have shown that in the first 3 years of life, children have achieved 80% of the brain cells needed for their entire life, especially in the first 30 days after birth, children have up to 80% of the brain cells compared to 3 months old.

Newborns sleep a lot in the first few weeks, often up to 16 to 17 hours a day. They sleep in short naps of 2 to 4 hours at a time. Sleeping too little or too much compared to the standard schedule is a worrying sign.