2 months of age refers to the birth of two months of the baby, that is, the baby is born after the full 60 days – 90 days, 31 days – 60 days after birth for the age of 1 month. Baby 2 months of age specifically refers to the baby’s growth and development has reached two months and less than three months, so it refers to the beginning of the full two months to the full three months, that is, the full 60 days – 90 days. At this age, growth checkups should be conducted on a regular basis to monitor and evaluate your baby’s length, weight, head circumference, hearing, and neurological development. If the baby lags behind in weight and height, timely nutritional checkups should be conducted, and attention should also be paid to whether there is any abnormality in the development of muscle tone and gross motor movements such as head lifting.