Sucking on her thumb or a pacifier is baby's way of soothing herself. According to the American Dental Association, there's no need for real concern regarding pacifier usage until age four, when permanent teeth start coming in, but you may want to consider weaning sooner rather than later for an easier transition — in addition to affecting teeth formation, it can also affect baby's ability to talk.
[tip] Opt for short, manageable stories when you read to baby — her attention span is only about three or four minutes right now. Trying to read for longer than that may cause her to get fussy.
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All medical information reviewed by Dr. Paula Prezioso of Pediatric Associates in New York City