my 100 days old daughter doesn't smile back at us. she only smiles at the ceiling and fans. google says it is sign of autism. i m very worried. kindly advise

A. Though you're likely anxious to see your little darling's smile, a lack of early grins doesn't necessarily mean she's unhappy or that something is wrong. Babies will hit this milestone at different times, and some may need a few extra weeks. But if your baby isn't smiling by 3 months, mention it to your pediatrician.