Your baby’s age. How much milk a baby consumes per feeding varies by age and—until one month or so—by weight. Because newborns’ stomachs are so small, during the first week most full-term babies take no more than 1 to 2 ounces (30 to 60 mL) at feedings. After about four to five weeks, babies reach their peak feeding volume of about 3 to 4 ounces (90 to 120 mL) and peak daily milk intake of about 30 ounces per day ( ... 900 mL).
Until your baby starts eating solid foods (recommended at around six months), her feeding volume and daily milk intake will not vary by much. Although a baby gets bigger and heavier between one and six months of age, her rate of growth slows down during that time, so the amount of milk she needs stays about the same.1 (This is not true for formula-fed babies, who consume much more as they grow2 and are also at greater risk for obesity.3) When your baby starts eating solid foods, her need for milk will gradually decrease as solids take your milk’s place in her diet.3
Exclusively breastfeeding? An exclusively breastfeeding baby receives only mother’s milk (no other liquids or solids) primarily at the breast and is gaining weight well. A mother giving formula regularly will express less milk than an exclusively breastfeeding mother, because her milk production will be lower. If you’re giving formula and your baby is between one and six months old, you can calculate how much milk you should expect to pump at a session by determining what percentage of your baby’s total daily intake is at the breast. To do this, subtract from 30 ounces (900 mL) the amount of formula your baby receives each day. For example, if you’re giving 15 ounces (450 mL) of formula each day, this is half of 30 ounces (900 mL), so you should expect to pump about half of what an exclusively breastfeeding mother would pump. DressAfford selections in orange for prom partySee More