A newborn needs surprisingly little breast milk at first, starting with just 2 to 10 milliliters (less than half an ounce) per feeding in the first 24 hours. That amount increases steadily over the first few weeks, reaching about 2 to 3 ounces per feeding by the end of the second week. The small volumes in those early days aren’t a problem. They match a stomach that’s roughly the size of a marble at birth.
Day-by-Day Feeding Volumes
A newborn’s stomach grows rapidly in the first week, and the amount of milk it can hold changes just as fast. Here’s what a typical healthy newborn takes at each feeding:
- Day 1 (0 to 24 hours): 2 to 10 milliliters, or roughly half a teaspoon to two teaspoons. This is colostrum, the thick, concentrated first milk your body produces. It’s small in volume but packed with antibodies and nutrients.
- Days 1 to 2: 5 to 15 milliliters, still less than half an ounce per feeding.
- Day 3 (72 hours): About 1 ounce (30 milliliters). This is typically when transitional milk starts coming in, and your baby begins taking noticeably more.
- Day 7: 1 to 2 ounces per feeding.
- Weeks 2 to 3: 2 to 3 ounces per feeding.
These numbers apply whether your baby is nursing directly or drinking expressed breast milk from a bottle. By about one month, most babies settle into a pattern of roughly 3 to 4 ounces per feeding, though individual variation is normal.
Why the First Feedings Are So Small
At birth, your baby’s stomach is about the size of a toy marble and holds only 1 to 2 teaspoons of liquid. By day 10, it has grown to the size of a ping-pong ball, holding around 2 ounces. This rapid but gradual expansion is why colostrum comes in such small amounts. Your body produces exactly what your baby’s stomach can handle.
New parents sometimes worry that colostrum isn’t “enough” because the volumes look tiny compared to what a bottle-fed baby might take. But colostrum is extraordinarily calorie-dense and rich in immune factors. Those few milliliters per feeding are doing a lot of work. Trying to push larger volumes in the first day or two can overwhelm a stomach that simply isn’t ready for more.
How Often Newborns Feed
Newborns breastfeed about 8 to 12 times in a 24-hour period. In the first few days, your baby may want to eat as often as every 1 to 3 hours, including overnight. That frequency is normal and necessary. Because each feeding is so small, frequent sessions ensure your baby gets enough total volume across the day.
As the first weeks pass, most exclusively breastfed babies shift to feeding every 2 to 4 hours. The per-feeding volume goes up while the frequency gradually comes down, though “cluster feeding” (bunching several feedings close together, often in the evening) remains common for weeks.
Reading Your Baby’s Hunger Cues
Measuring ounces is useful as a general guide, but the most reliable way to know if your baby needs to eat is by watching their behavior. Crying is actually a late sign of hunger. Earlier cues include putting hands to the mouth, turning the head toward your breast or a bottle (called rooting), puckering or smacking the lips, and clenching the fists.
When your baby is full, you’ll see the opposite: a closed mouth, head turning away from the breast or bottle, and relaxed, open hands. Responding to these signals rather than trying to hit an exact ounce target helps your baby regulate their own intake naturally.
How to Tell Your Baby Is Getting Enough
Since you can’t see how many ounces a breastfeeding baby takes directly from the breast, diaper output is the most practical way to track intake. After day 5, a newborn who is getting enough milk will produce at least 6 wet diapers per day. Stool frequency varies more, but you should see regular bowel movements in those early weeks.
Weight gain is the other key indicator. Newborns typically lose some weight in the first few days (up to about 7 to 10 percent of birth weight is considered normal). After that initial dip, healthy newborns gain about an ounce per day on average during the first three months. Your baby’s pediatrician will track weight at early checkups to confirm feeding is going well.
Bottle Feeding With Expressed Milk
If you’re pumping and offering breast milk in a bottle, the same volume guidelines apply. The difference is that bottles make it easier to overfeed because milk flows more freely than it does from the breast. Paced bottle feeding, where you hold the bottle more horizontally and let the baby control the pace, helps prevent your baby from taking in more than their stomach comfortably holds.
For the first few days, a syringe or small bottle with colostrum measured in milliliters is more practical than a standard bottle. Once volumes increase past an ounce or two, a regular bottle works fine. Watch for fullness cues like turning away or relaxing the hands rather than encouraging your baby to finish a set amount.