Pick a pediatric specialist, known as a "pediatrician."  They have the specialty training of having spent 3 years (after completing medical school) of learning about health problems of infants, children and adolescents. Most learn their skills at larger medical centers, which see the sickest, most challenging patients. This prepares the general pediatrician  to care for almost all aspects of health relating to infants and children.

Pick a Board Certified pediatrician. This indicates that the doctor has successfully completed a rigorous training residency (at least 3 years) and has passed a very difficult standardized test administered by a "board" of experienced pediatricians (usually either the American Board of Pediatrics or the American Board of Osteopathic Pediatrics). This is the minimum benchmark requirement for a quality pediatrician.

Pick an experienced Board Certified pediatrician. Practical experience in caring for infant and children health problems provides assurance that the doctor's training and "bookwork" have crossed over to become clinically effective in making accurate diagnoses and safe recommendation and treatment plans.

Pick an experienced Board Certified pediatrician that is also a parent !! From my own experience as a pediatrician and a parent, I confess that being a parent involved in caring for my own children's day-to-day needs, is as important  (if not MORE important) in making me a good pediatrician as my residency training and practice experience. As a pediatrician/parent, there is that empathetic perspective that helps me incredibly.

Pick an experienced Board Certified pediatrician that is a parent AND that you like.  Clearly, personalities must mesh for trust to develop between a pediatrician and the parents they deal with. Ask to spend a 5 or 10 minute "prenatal conference" or interview with the pediatricians on your list. Simply see how easy it is to talk to her; does she seem interested and excited for your upcoming arrival ? Ask questions pertaining to their training and experience, as noted above. Once the above four criteria are met, use this last one to confirm that "this IS the right doctor for MY baby!"