Additionally, if during the experimental group medical check-ups at 2, 6 or 12 months of CGA, the physician trained in ADBB detects social withdrawal or finds any acute morbidity such as acute respiratory infection, fever, dehydration, hyperemesis, diarrhea, prolonged pain or irritability, or some acute condition that might affect the quality of the baby's interactions, he will perform a second assessment with the ADBB scale within 15 days.