Social smile

The social smile is a developmental milestone observed in infants around 6 to 8 _______ ___ _________ _____ _____ __________ _________.
______ _______ ________ _____ _________.
_____ ________ ____ ___ ___ ______ _________ _________ ______ __________ ______.
_________ ____ _________ ______ ___ ______ _______ __________.
________ _________ ___ ___ ______ _____ _______ ______.
_________ ___ _________ ____ ____.
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