If a baby does not smile, parents should prioritize face-to-face interactions. Focus on smiling, playing, singing, and doing other activities the baby enjoys. If the baby still does not begin ...

While every baby develops at their own pace, a lack of eye contact, smiling, or reaction to familiar faces by 6 months is ...

"It may be that seeing your own baby's smiling face is like a 'natural high' ". The strength of the reaction depended on the baby's facial expression, he said. "The strongest activation was with ...