For babies born at normal full-term, 2 months of age refers to the stage when the baby is 2 months old but not yet 3 months old, i.e. 60-90 days, and does not refer to the baby’s 30 days to 60 days. For babies under one year of age, clinical age is often used to calculate the size of the baby, while for normal full-term birth of the baby, the age of the month generally refers to the full month, in which the period of 0-30 days are 0 months of age, so 1 month of age refers to the full of the first month, and each subsequent day is called 1 month and a few days, and 2 months of age refers to the full of the second month, and each subsequent day is called 2 months and a few days. After the birth of the baby, with the growth of the age of the month, the baby’s IQ and perceptual ability will gradually grow, so daily should carefully observe the baby’s body and behavioral changes, if there is developmental delay abnormalities, should also be timely to consult a doctor.