The amount of milk for a three-month-old baby can usually reach 120-150 ml per session, totaling about 750-900 ml a day. Breastfeeding is generally recommended, the ratio of nutrients in breast milk is more suitable for fetal absorption, when breast milk is insufficient can be mixed feeding or formula feeding, three-month-old babies per kilogram of body weight a day milk amount is about 120-150 ml. The amount of milk per day and per time will vary from baby to baby depending on the weight difference, the size of the stomach capacity and the amount of nutritional needs. If your baby is consistently fed too little milk, it may affect his or her development and increase the risk of malnutrition. At this point, you need to intensify feeding and slowly increase the amount of milk for your baby. Babies who grow faster or have a heavier newborn weight will have more milk in a day, up to 1,000 ml/day for some babies. It is advisable to keep a close watch on the fetus during feeding and consult your doctor if you notice any discomfort. It is also necessary to control the amount of food the fetus eats per day to avoid over-eating which may lead to indigestion and other conditions.