Children should gain about 2 pounds at full term compared to their birth weight. If there is poor weight gain at full term, pay attention to the possibility of insufficient breast milk or formula ratios being too diluted. If there is an obvious lack of weight gain and weight gain is less than 1 pound, you should pay attention to the possibility of congenital pyloric stenosis or hypertrophy and other diseases, and you need to go to the hospital in time. In addition, to determine whether the child is getting enough milk, the number of times he or she urinates can be evaluated, usually at least 6-8 times within 24 hours.