There is no authoritative information on how many milliliters of milk a one-month-old baby takes at a time, usually around 100ml. If too little is consumed, it may lead to malnutrition, and too much may lead to indigestion and other uncomfortable symptoms. There is no clear clinical data on the exact value of milk intake for one-month-old infants, and most one-month-old infants receive about 100ml of milk each time. However, the exact amount should be judged according to the infant’s weight, height and other factors. If the infant is large and fat, the milk should be fed according to the infant’s needs. It is important to note that breastfeeding should be done on demand, and it is not advisable to let the baby eat too little to avoid malnutrition which may affect the growth and development of the baby. It is also not advisable to breastfeed too much to prevent indigestion due to incomplete development of the gastrointestinal tract. One-month-old babies should be breastfed on demand, and the amount of milk should be increased as the baby grows, so as to benefit the baby’s development.