At what age do infants begin to show social smiles?

Infants typically begin to show social smiles around 6 to 8 weeks of age. This behavior is an important developmental milestone, as it reflects the infant's ability to engage and interact with others socially. Social smiling indicates that the baby is beginning to recognize and respond to familiar faces and stimuli, signaling emotional development and the establishment of a bond with caregivers.

During the earlier weeks, newborns often exhibit reflexive smiles, which are automatic and not a response to social interaction. However, as their vision and social engagement improve, the smile transforms into a conscious social expression. By around 8 weeks, the coordination of their visual and emotional responses enables them to smile in response to others, showcasing their growing social awareness and connection with the environment.