The Size of Your Baby’s Stomach: Breastfeeding in the Early Days

April 7, 2015

It’s totally common for a new mom to doubt her breast milk supply and question whether she’s making enough milk to satisfy her little one. But, even though your breasts might only produce a few drops of colostrum (“first milk”) in the days after you give birth, that breast milk is the perfect nutrition for your baby. Colostrum is nutrient-rich and contains a high concentration of antibodies while helping to gently clear baby’s intestine. Understanding how milk production works – and what your baby really needs – can help give peace of mind in the early days. If you’re not sure that baby is getting enough, you can ask yourself these questions:

Is your baby breastfeeding frequently?

In general, a baby should nurse 8 to 12 times in a 24-hour period for the first few days to weeks. Breastfeeding frequently will also help you establish and maintain your supply because your breasts produce milk on a supply-and-demand basis.

Does your baby determine the length of feedings?

It’s best to let your baby determine when a feeding is over and avoid ending a feeding before they are finished. Your baby will either come off the breast or fall asleep when they’re done eating. Also, pay attention to your baby’s hunger cues.

How much weight is your baby gaining?

By 10-14 days after birth, your baby should recover any lost birth weight. Then, for the first 4 months of a baby’s life, average weight gain is about 5-7 ounces per week. If baby is growing normally, you can be confident that your supply is providing your baby with the nutrition they need.

How does your baby look and act? 

In general, if your baby is receiving enough breast milk they should look outwardly healthy and be active, alert and content.

 How many wet and dirty diapers is your little one having each day?

Look for your little one to have at least 6 wet diapers and 3 yellow stools per day by about day five after birth. This pattern generally continues for the first 6 months.

Are you hearing swallows during feedings?

While feeding, you should be able to hear your little one swallowing as your milk flows.

You might question whether baby is removing enough milk from your breasts – but your milk supply changes to meet your baby’s needs and their tiny stomach can’t hold large amounts of breast milk yet.

In fact, here are some general ranges for full-term infant stomach size from birth to two weeks:

size of baby's stomach in first weeks


[Image updated: 12/21/15]

Did you doubt your supply when you first started breastfeeding? When did you start to feel more confident about your milk production?

105 thoughts on “The Size of Your Baby’s Stomach: Breastfeeding in the Early Days

  1. Laura Ashwell says:

    How much breastmilk should i be expressing for one feed? My baby is five weeks old and i leave 120ml for a feed while i nip out to my horses for an hour and Sometimes when i get back he still wants more…

    • Hi Laura,

      In general, babies between 1–6 months of age normally drink an average of 19–30 ounces per day. An average size meal for a breastfed baby is between 3 – 5 ounces of breast milk. You can find more information about how to tell your baby is getting enough breast milk in our blog here: Please also feel free to reach out to our Lactation Consultant for guidance (completely free of charge over email): Keep up the great work!

      • I have weaned my baby over the last two weeks onto solids. He has also come off the breast and onto bottle. He gets about 300ml of expressed a day and the rest I have to give him formula as I just don’t seem to produce much now days. I have the medela swing pump and all the kit but how to I increase my milk flow now that he isn’t latched to me anymore

  2. Hi! My baby is one month old. When I nurse her, she latch for 4 minutes on each breast. I’m not sure if she gets enough milk to eat or not. Also I want to know how many oz she eats, so I pump and give her a bottle. She only eats 2 oz. I think she eats so little because I have read in the Internet ” it said by the end of your baby turn to one month; she or he should eats 4 oz. ” This makes me worry about my baby a lot.

    • Hi Da,

      Congratulations on your new little one! We recommend working with your baby’s healthcare provider or a Lactation Consultant to make sure that your baby is getting enough breast milk. You can find a Lactation Consultant near you by searching here:

      Or, please feel free to reach out for one-on-one guidance over email (for free!) from our Lactation Consultant:

      Hope this helps, keep up the amazing work!

    • Sounds like your baby is just really efficient at draining your breasts now! As long as they are gaining weight and having enough wet diapers that’s whats important. Babies are 10 star pump while actual pumps are 4 stars

    • You can’t judge the amount baby gets by pumping because a pump isn’t an efficient as a your baby and won’t get as much milk. You can only go by weight gain, and wet/soiled diapers, and other signs of hydration.

  3. All other charts say 2.5-5 oz and the size of a large egg at one month, not 2 weeks. 5 oz at two weeks is a huge amount of milk at once. Do you have sources for this info?

  4. Hi, my baby is 4 days old today and for the first 2 days of life while in the hospital I was latching him to my breasts until I started having bleeding from not having him latch correctly. I’ve been pumping since being home Saturday and my supply has gone up. I’m now pumping about an ounce on each breast (1-2 oz total each feed depending on how much I have) , but I feel that’s too much to feed him each feed, since he’s only 4 days. Should I let him have that much milk if he wants it? I plan on reattempting breastfeeding once my breasts have healed.

    • Hi Stephanie,

      Congratulations on your new little one! You can reach out to our Lactation Consultant via email here: We recommend also following up with your health care provider, who would be best suited to help you. Keep up the amazing work!

  5. Pingback: Breastfeeding Basics – How Much Breast Milk At 5 Weeks?

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