Your baby will gain more than 1kg per month until 3 months of age. In the first 3 months of life, the baby’s weight gain is the most rapid, about 1kg or more per month. after 3 months the weight gain gradually slows down. Children’s weight fluctuates somewhat within the normal range, but if there is a serious failure to meet the standard, you must go to the hospital in time for consultation, according to the child’s situation for a correct analysis, if it is a feeding problem should be improved in a timely manner, and if it is caused by a disease should be treated in a timely manner. During the baby’s growth period, strengthen the nutrition is the necessary key, and secondly and heredity also has certain factors, if the parents height or weight is relatively large, the child’s weight and height will also grow rapidly. Pay attention to regular medical checkups, and seek timely medical treatment when problems are found.