Babies typically start smiling between 6 and 8 weeks old. Early smiles before this time are usually reflex smiles, which are involuntary and not social. The first real or social smiles generally appear around 6 to 8 weeks, when babies respond to external stimuli like voices or faces by smiling with their whole face lighting up. By 2 to 3 months, babies smile more purposefully, often recognizing familiar people and enjoying interactions. Laughter tends to come later, around 4 to 6 months of age.
Reflex vs. Real Smiles
- Reflex smiles occur in newborns spontaneously and usually stop by 2 months.
- Real smiles are social, intentional responses that manifest typically at 6 to 8 weeks.
Developmental Significance
- Smiling is a key part of early bonding and communication.
- It helps build secure relationships and contributes to emotional and social development.
Timeline Summary
- Birth to 6 weeks: Reflexive smiles.
- 6 to 8 weeks: First real social smiles.
- 2 to 3 months: More frequent, purposeful smiling.
- 4 to 6 months: Start of laughter and more interactive smiling.
This timeline can vary slightly by individual baby, but the 6 to 8-week window is the typical period to start expecting social smiles.
