A three-month-old baby probably needs to drink around 800 ml to 1500 ml of milk a day. However, each baby’s physical condition and appetite are not the same, so it varies from person to person. Generally speaking, breastfeeding should be done on demand and not too frequently, so as not to affect the baby’s stomach. When the baby is about three months old, the amount of milk may increase significantly, each time you need to drink about 150 ml, divided into five to eight feedings per day. However, it should be noted that at this time is the baby is willing to eat as much as possible, do not force, so as to ensure that the child’s nutritional supply is adequate. The amount of milk eaten by the child is related to the individual’s digestive function, so each breastfeeding is required to observe whether the child is crying, whether there is overflow of milk, spitting phenomenon. If the baby’s appetite is poor and weight gain is slow, you need to go to the hospital pediatrician in time, under the guidance of the doctor to adjust.