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Why Babies Smile

Baby Smiles at 6-12 months

During this period you will start to see lots of different smiles. As a general rule, open mouth smiles demonstrate more joy than closed. Your baby will also start to play with laughter. By eight or nine months, smiles are used often in social situations and as a method of communication so make sure to respond to your baby when she gives you a big smile.

Meet our Expert:

Dr. Daniel Messinger is an associate professor of psychology and pediatrics at the University of Miami. He has written numerous research papers on the topic of infant smiling.