1. Changes in milk volume of five-month-old babies When babies are five months old, their milk volume will change. Generally speaking, a five-month-old baby needs to drink milk 5-6 times a day, about 120-180 ml each time. However, each baby\’s food intake and appetite are different, so the amount of milk needs to be determined based on your own situation. 2. How to determine the baby\’s milk volume. In order to determine the baby\’s milk volume, you can start from the following aspects: 1. Observe the baby\’s behavior: If your child stops sucking quickly during feeding or shows that he does not want to feed anymore seems to be full, then this may mean that he has eaten enough