Are You Producing Enough Breastmilk for Your Baby?

If you’ve spent any time googling “how do I know I’m making enough milk” at 3am with a baby snuffling on your chest, you are absolutely not alone. It’s one of the most common worries new parents have, and it makes sense. Breastmilk doesn’t come with a measuring line on the side like a bottle of formula, so you’re relying on other clues to tell you things are going well. The good news is that those clues are pretty reliable once you know what to look for.

Why This Worry Is So Common

With bottle feeding you can see exactly how many millilitres your baby has taken. With breastfeeding, you’re working blind. You can’t watch the milk disappear, so it’s easy to start second-guessing yourself, especially in the early weeks when everything feels new and your baby seems to want to feed constantly. Try not to judge your supply by how full your breasts feel or how much you can pump. Neither of those things is a reliable measure of what your baby is actually getting.

The Real Signs Your Baby Is Getting Enough Milk

These are the signs midwives and health visitors actually look at, not guesswork.

Weight gain over time

It’s completely normal for a newborn to lose some weight in the first few days, usually up to around 7 to 10% of their birth weight. Most babies are back to their birth weight by two to three weeks old, and after that you’re generally looking for steady, consistent gain rather than big jumps. Your midwife or health visitor will plot this on a growth chart at weigh-ins, and that chart, tracked over weeks, tells you far more than any single weigh-in. If your baby loses more than 10% of their birth weight, or isn’t regaining it by around the two week mark, get them checked rather than waiting it out.

Wet nappies

This one shifts as your baby gets older. In the first couple of days you might only see one or two wet nappies, which is expected while your milk is still coming in (colostrum is produced in tiny amounts on purpose). By day four or five, once your milk supply has increased, you should be seeing at least six heavy, wet nappies in 24 hours. A nappy that feels genuinely soaked, not just slightly damp, is what you’re after.

Dirty nappies

In the first day or two, expect dark, sticky meconium. By day three or four, stools usually turn a lighter, mustardy yellow and become looser and seedier looking, which is a good sign your baby is getting proper milk, not just colostrum. After the first month or so, some breastfed babies go several days between dirty nappies without it being a problem, as long as weight gain is on track and your baby seems comfortable.

Feeding behaviour

You should be able to hear and see your baby swallowing during feeds, not just sucking. Their jaw should move rhythmically and you’ll often hear a soft “kaa” or gulping sound. A baby who feeds well tends to come off the breast on their own looking relaxed, with loose hands and a sleepy, satisfied look, sometimes called milk drunk. If your baby seems frantic at every feed, is constantly falling asleep within a minute or two of latching, or never seems to settle after a feed, it’s worth getting your latch and positioning checked by a midwife, health visitor or lactation consultant, since a poor latch can look like a supply problem when it’s actually a transfer problem.

Alertness and general wellbeing

A well fed baby generally has good skin colour, is alert during awake periods, and meets feeding roughly 8 to 12 times in 24 hours in the early weeks (this spaces out as they get older). Some babies feed very efficiently in 10 minutes, others take 40. Both can be completely normal.

When to Get It Checked, Not Just Reassured

Most of the time these worries turn out fine, but there are a few signs that genuinely warrant a call to your GP, midwife or health visitor rather than just waiting and watching:

• Fewer than six wet nappies a day after your milk has come in (day 5 onwards)
• No weight gain, or continued weight loss, especially past two weeks old
• Your baby seems unusually sleepy, floppy, or hard to wake for feeds
• Very dark or concentrated wee, or no dirty nappies at all after the first few days
• Signs of dehydration such as a sunken soft spot, dry mouth, or fewer tears when crying
• Jaundice that seems to be getting worse rather than better

None of these are things to diagnose yourself off a phone screen. If something feels off, get your baby seen. It’s always better to check and be told everything’s fine than to sit and worry.

Pumping Output Doesn’t Tell You What You Think It Does

A lot of parents assume that if they can only pump 2oz, their baby must only be getting 2oz too, and that simply isn’t how it works. A baby at the breast is far more effective at extracting milk than most pumps, partly because of how a baby’s suck pattern changes throughout a feed and partly because pump response varies hugely from person to person and even from day to day for the same person. Some people with a completely healthy supply pump very little, especially if their baby is directly breastfed most of the time and pumping is just for the odd bottle.

If you’re exclusively pumping, your output is a more meaningful number, but even then it fluctuates with stress, time of day, how recently your baby fed, and how well the pump flanges actually fit you. If you’re worried, a lactation consultant can check your pump fit and technique, which makes a bigger difference than most people expect.

For bottle-fed breastmilk, the reassuring signs are the same as above: steady weight gain, good wet and dirty nappy output, and a baby who settles after feeds. Paced bottle feeding (holding the bottle horizontally and letting your baby take breaks) also helps them feed at their own pace and makes it easier to notice when they’re actually full, rather than just finishing the bottle because it’s there.

Growth Spurts and Cluster Feeding Aren’t a Sign Something’s Wrong

Around two to three weeks, six weeks, and three months, a lot of babies go through phases of wanting to feed much more often than usual, sometimes every hour for a day or two. This is often called cluster feeding, and it’s your baby’s way of asking your body to ramp up supply to meet their growing needs. It feels relentless while it’s happening, but it usually settles within a few days once your supply catches up. It doesn’t mean your milk has “dried up” or that you suddenly need to top up with formula, though if you’re exhausted and want extra support during a spurt like this, there’s nothing wrong with asking your health visitor or a lactation consultant for reassurance.

What Actually Affects Milk Supply

Milk production works on a supply and demand basis. The more effectively and frequently milk is removed from your breasts, whether by your baby or a pump, the more your body is signalled to make. A few things that genuinely make a difference:

• Frequency and effectiveness of feeds: Long gaps between feeds, or feeds where your baby isn’t transferring milk well because of a shallow latch or tongue tie, can slow supply down over time.
• Early supplementing: Giving formula top-ups in the early weeks without a medical reason can reduce how often your baby feeds at the breast, which in turn can reduce your supply. If a top-up is medically recommended, that’s different, but it’s worth asking why before assuming it’s necessary.
• Hydration and eating enough: You don’t need to force down litres of water, but going properly hungry or dehydrated yourself won’t help. Eating regularly and drinking to thirst is generally enough.
• Stress, pain and exhaustion: These don’t stop milk production outright, but they can affect the let down reflex, which can make feeds feel less productive even when your supply is fine.
• Certain medications, smoking, or hormonal contraception: Some of these can lower supply. If you’re starting a new medication or contraceptive, it’s worth mentioning breastfeeding to your GP or pharmacist.

If You’re Genuinely Worried About Low Supply

Keep feeding on demand rather than to a strict schedule, and let your baby finish one side before offering the other. If you think transfer might be the issue rather than supply itself, ask for a latch check, ideally in person, from a midwife, health visitor or IBCLC lactation consultant. You might hear suggestions about foods or herbal supplements said to boost supply, but the evidence behind most of these is weak, so it’s better to focus on frequent, effective feeding and get proper support rather than relying on a particular tea or biscuit to fix things. If a lactation consultant suggests pumping between feeds for a short period to increase demand, that’s a more evidence-based approach and worth trying under their guidance.

Where to Go for Support

You don’t have to sort this out alone or just hope for the best. Your health visitor, GP or midwife can weigh your baby and check for any medical concerns. A lactation consultant (IBCLC) can do a proper feeding assessment, watch a full feed, and check positioning and latch in detail. Local breastfeeding support groups and helplines (such as the National Breastfeeding Helpline in the UK) are also worth using, especially in those first few weeks when everything feels uncertain.

Most of the time, the signs are there and they’re reassuring once you know what you’re actually looking for: steady weight gain, plenty of wet and dirty nappies, and a baby who settles after feeds. Trust those signals over how full or empty your breasts feel, and don’t be afraid to get things checked if your gut tells you something isn’t quite right. You know your baby better than anyone, and that instinct is worth listening to.