It is, without doubt, one of the most common worries I hear from new parents — and one of the most anxiety-inducing things about breastfeeding in those early weeks.
Is my baby getting enough? How can I tell? What if they’re not?
When you’re bottle feeding, you can see exactly how much your baby has taken. When you’re breastfeeding, that reassurance simply isn’t there — and in its absence, doubt has a habit of moving in. A baby who feeds frequently, a breast that feels soft, a baby who cries after a feed — all of these can feel like evidence that something is wrong, even when everything is going perfectly well.
The good news is that while you can’t measure what your baby takes at the breast, there are reliable signs that tell you — clearly and confidently — whether feeding is working. This post walks you through all of them.
First, Let’s Talk About Why This Worry Is So Common
Breastfeeding works on a supply-and-demand basis. Your body makes milk in response to the signals it receives — the more milk your baby takes, the more your body produces. In the early weeks, this system is still establishing itself, which means feeds can be frequent, unpredictable, and sometimes feel relentless.
Many of the things that worry parents — a baby who wants to feed every hour, breasts that don’t feel full, a baby who seems unsettled — are completely normal features of a breastfeeding relationship finding its rhythm. They are not evidence that your milk is insufficient.
At the same time, genuine supply difficulties do exist, and they matter. The key is knowing which signs are genuinely meaningful and which are red herrings.
The Signs That Actually Tell You Feeding Is Working
1. Wet and Dirty Nappies
Nappy output is one of the most reliable indicators of milk intake available to you. What goes in must come out — and tracking nappies in the early days gives you genuinely useful information.
In the first few days: Your baby will pass meconium — the thick, dark, tar-like substance that has been in their bowel since before birth. As your milk comes in and your baby takes more, the stools will gradually change colour, moving from black to dark green to khaki to yellow. This transition usually happens over the first three to four days.
By day four or five: You should be seeing at least five to six wet nappies per day and two to three yellow, seedy stools. Some breastfed babies will pass a stool at almost every feed. Others, after the first few weeks, may go several days between dirty nappies — both can be normal once feeding is well established, provided everything else is on track.
Wet nappies — what to look for: Modern disposable nappies are very absorbent and a wet nappy can be hard to identify by feel. A nappy with two to three tablespoons of water poured into it gives you a rough idea of what sufficient wetness feels like. If you’re unsure, placing a piece of tissue inside the nappy makes wetness easier to spot.
Consistently dry nappies, or nappies that remain dark or infrequent beyond the first few days, are a sign that warrants attention. Contact your midwife or health visitor, and reach out to a lactation consultant.
2. Weight Gain
Weight is the other key objective measure of milk intake, and it’s monitored closely for a reason.
What to expect:
Almost all babies lose weight in the first few days after birth — this is entirely normal and expected. A loss of up to 10% of birth weight is considered within the normal range. Some babies lose a little more and recover well; others lose less. The direction of travel matters more than the exact number.
Most babies return to their birth weight by around 10–14 days, though many do so sooner. From there, your baby should be gaining weight consistently — typically around 150–200g (approximately 5–7oz) per week in the early weeks, though this varies and a single week’s measurement is less meaningful than the overall pattern over time.
Weight is plotted on centile charts, and while it’s normal for babies to move slightly between centiles in the early weeks, a consistent drop across multiple centile lines is a sign that feeding needs to be assessed.
Important: Weight is one measure among several, not the only one. A baby who is gaining weight but feeding is very painful for you still deserves support. And a single weigh-in that looks lower than expected doesn’t always tell the whole story. Always look at the whole picture.
3. Your Baby’s Behaviour at and After the Breast
How your baby behaves during and after a feed tells you a great deal about how feeding is going.
Active, rhythmic sucking and swallowing: In a feed that is going well, you’ll typically see a pattern of rapid, shallow sucks at the beginning — this triggers your letdown — followed by deeper, slower, more rhythmic sucks as the milk flows. You should be able to hear or see your baby swallowing, particularly once your milk has come in. A small pause after every one or two sucks, where your baby’s jaw drops lower than usual, is the swallow.
Feeding to satisfaction: A baby who is getting enough will typically come off the breast spontaneously when they’re full, looking relaxed and content. Their hands, which may have been tightly fisted at the start of a feed, often relax and open. Many babies fall asleep at the breast — this is normal.
Appropriate alertness between feeds: A well-fed baby will have periods of alertness between feeds where they are calm, interactive, and content. They should be able to be roused for feeds and show feeding cues when hungry.
A baby who is very sleepy, difficult to rouse, or who feeds without ever seeming satisfied may not be transferring milk efficiently — this warrants a feeding assessment.
4. How Your Breasts Feel
This one is more nuanced, because breast fullness is not a reliable indicator of milk supply — and many parents are misled by it.
In the early days, many women experience significant engorgement as their milk comes in. But as supply regulates over the first few weeks — usually by four to six weeks — breasts often stop feeling full and heavy between feeds. This is normal. It means your body has adjusted to your baby’s needs and is no longer overproducing. Soft breasts are not empty breasts.
What is meaningful:
- A breast that feels noticeably softer after a feed than before is a sign that milk has been transferred
- A letdown sensation — a tingling, tightening, or feeling of pressure — tells you milk is flowing
- Leaking milk from the opposite breast while your baby feeds is a sign your letdown reflex is working
What is not a reliable indicator:
- How full your breasts feel between feeds
- Whether you can express much milk (the amount you can pump is not a reliable reflection of your supply — babies are far more efficient at the breast than any pump)
5. Your Baby’s General Wellbeing
Step back from the individual data points and look at your baby as a whole. A baby who is getting enough milk is:
- Alert and engaged during wakeful periods
- Meeting developmental milestones — smiling, tracking faces, increasing interaction as the weeks go on
- Growing — not just in weight but in length and head circumference
- Generally content, even if not always — all babies have fussy periods
Skin colour matters too. Jaundice — a yellowing of the skin and whites of the eyes — is common in newborns and is usually harmless. However, jaundice can make babies very sleepy and affect their interest in feeding. If your baby is jaundiced, it’s important to feed frequently and seek guidance from your midwife or health visitor.
Signs That Suggest Feeding May Need to Be Assessed
The following are worth taking seriously and acting on promptly — not to frighten you, but because early help makes a genuine difference:
- Fewer than five to six wet nappies per day after day four
- Stools that haven’t transitioned from dark to yellow by day four or five
- A baby who has lost more than 10% of birth weight
- A baby who hasn’t returned to birth weight by two weeks
- Weight gain that is consistently slow or has stalled
- A baby who is very difficult to wake for feeds, or who feeds but doesn’t seem satisfied
- A baby who is clicking at the breast, slipping off frequently, or appearing to struggle to latch
- Nipple pain that isn’t improving
- A baby who is jaundiced and very sleepy
None of these necessarily mean your milk supply is the problem — they mean feeding needs to be looked at properly. Often there is a completely addressable reason why milk transfer isn’t working as well as it should be.
Common Things That Don’t Mean Your Baby Isn’t Getting Enough
Because so many parents are reassured by the wrong things and worried by the wrong things, it’s worth naming some of the most common misconceptions:
Frequent feeding does not mean low supply. Breastfed babies feed frequently — often every one to three hours in the early weeks. This is normal and expected. Frequent feeding is how supply is established. A baby who wants to feed every hour is not necessarily hungry; they may be cluster feeding, going through a growth spurt, or simply enjoying the closeness.
A baby who cries is not necessarily hungry. Crying is a baby’s only way of communicating, and hunger is just one of many things they might be communicating. A baby who has just fed and is crying may be windy, overtired, overstimulated, or in need of comfort.
Soft breasts do not mean low supply. See above. As supply regulates, most women stop feeling engorged between feeds. Soft does not mean empty.
Not being able to pump much does not mean low supply. Pumping output is not a reliable measure of milk production. Many women with excellent supply find pumping difficult. Your baby is far more efficient at the breast than any machine.
A baby who won’t settle after a feed has not necessarily had too little milk. Fussiness after feeds has many possible causes — wind, reflux, overstimulation, or simply needing more comfort. It is not a reliable indicator of insufficient milk.
What About Formula Top-Ups?
If your midwife or health visitor has recommended formula supplementation, please follow their guidance. If your baby genuinely isn’t getting enough milk, their nutritional needs come first — and supplementing while you work on feeding is not failure. It is good, responsive parenting.
If you have been advised to supplement and you want to protect your breastfeeding relationship alongside that, getting IBCLC support quickly is important. With the right help, many parents successfully transition back towards full breastfeeding after a period of supplementation — but the window for doing so is narrower than many people realise, and timely support matters enormously.
When to Get Help
If you are unsure about any of the above — if you’re worried about nappy output, weight gain, or how feeding feels — please don’t wait and hope things improve. Early support genuinely makes a difference.
Reach out to:
- Your midwife or health visitor for an initial assessment and weight check
- An IBCLC lactation consultant for a comprehensive feeding assessment if concerns persist or feel complex
- Your GP if you have concerns about your baby’s health or wellbeing
You don’t have to have a specific, named problem to seek support. “Something doesn’t feel right” is enough of a reason. If that’s where you are, please get in touch — I’d be glad to help you work out what’s going on and put a plan in place.
A Final Word
Most parents who worry about whether their baby is getting enough milk turn out to have a baby who is feeding just fine. But the worry is real, and it deserves to be taken seriously — not dismissed with a breezy “you’ll know if they’re hungry.”
The signs in this post give you something concrete to look at. Track nappies, attend weight checks, watch your baby feed, and trust your instincts. And if something doesn’t feel right, seek support without delay.
You are doing an extraordinary thing. You deserve information, reassurance, and help when you need it.
Louise Bicknell is an IBCLC-certified lactation consultant and tongue tie practitioner based in Polegate, East Sussex. She offers home visits across East Sussex and Zoom consultations UK-wide. If you have concerns about your baby’s feeding, please don’t hesitate to get in touch.