How do I know my baby is getting enough milk?

You can tell your baby is getting enough milk from output and weight, not from how your breasts feel. The NHS expects at least 6 heavy wet diapers every 24 hours from day 5, and from day 4 at least 2 soft yellow stools a day through the first few weeks. The AAP adds at least 8 to 12 feeds in every 24 hours, and the NHS looks for steady weight gain once the first 3 to 4 days are behind you.

Almost everything else you are weighing at 3 a.m. — a breast that went soft this afternoon, a feed that lasted five minutes, a baby who woke again at 1:40 — tells you less than it feels like it does. What follows is the two measurements that do the work, and the point at which counting becomes a phone call.

What can you actually measure at home?

Two things: what comes out, and what the scale says. The AAP puts it plainly — if you are breastfeeding, you can’t measure exactly how much milk your newborn is taking. Minutes record how long a feed lasted, not what went in, so the evidence has to come from outside the feed.

• Diapers, day by day. The counts change with age, so the day matters as much as the number. A day-two count read against day-five figures looks like a crisis and is not one.
• Weight, across weeks. Not a single reading but a dip and then a climb, measured on a proper scale at a check-up.

The NHS also lists signs you can see during a feed, such as rhythmic sucks and swallows and a baby who seems content after most feeds. Useful context, not the measurement.

Two measurements decide this, and neither of them happens while you are feeding.

How many wet and dirty diapers should there be, day by day?

The number climbs over the first week, so the right count depends on the day. The NHS says a baby is likely to have only 2 or 3 wet diapers in the first 48 hours, then at least 6 heavy wet ones every 24 hours from day 5. Stools follow their own ramp, from dark and tarry to yellow and loose.

La Leche League International fills in the middle of that ramp: two wet diapers by day two, three or more on days three and four, and usually six or more by five days old.

Heavy matters, because a modern disposable can hold a fair amount without looking any different. To calibrate, the NHS suggests pouring 2 to 4 tablespoons of water into an unused diaper and feeling the weight. The AAP’s color note is the other half: six wet diapers with dark urine is a different signal from six with pale.

Nobody reconstructs a day accurately at midnight, so mark each diaper as you change it. A pencil line on the box lid works, and Bunavi does it in one tap. The stage-by-stage detail is in wet and dirty diapers in the first weeks.

What does normal weight gain look like in the first weeks?

A dip, then a climb. The AAP expects a newborn to lose no more than 8 to 10 percent of birth weight in the first few days before starting to gain, and the NHS calls some loss in the first 3 to 4 days normal. La Leche League International looks for birth weight back by 10 to 14 days, then about 155 to 240 g (5.5 to 8.5 oz) a week until four months.

That is why the first weight check comes early. The AAP recommends the first check-up no more than 48 hours after you leave the hospital, and says the weight taken there helps show whether your baby is getting enough milk.

Why one reading says little is covered in what a growth percentile actually means.

Do soft breasts or a low pump output mean my supply has dropped?

No. Neither is a measure of supply. The Academy of Breastfeeding Medicine’s 2022 protocol says lactating breasts can feel lumpy and even painful at times, and that milk volume depends on feedback: more milk removed means more milk made.

• How full your breasts feel. The NHS does list breasts that feel softer after a feed among its good signs. That is a change across one feed, not a verdict on supply from one day to the next.
• What you can pump. The ABM notes that a mechanical pump stimulates production without extracting milk the way a baby does. What lands in the bottle tells you about that pump session, not about what your baby takes at the breast.
• How often the feeds come. The AAP’s at least 8 to 12 feeds in 24 hours is a floor, not a cap.
• Night waking. The WHO recommends breastfeeding on demand, as often as the child wants, day and night.
• How long a feed lasts. The NHS says to feed for as long as your baby wants. Length does count at the extremes: La Leche League International lists a baby who falls asleep shortly after starting to feed, or regularly takes longer than 30 to 40 minutes, as a sign to get help.
• Fussy evenings. The NHS looks for a baby who is content after most feeds, not all of them. A hard evening in a baby whose diapers and weight are on track is covered in cluster feeding in the evenings.

The ABM also reversed an old instinct: feed on demand, and do not aim to empty the breasts. If you are expressing anyway, the practical side is in pumping and storing breast milk.

What about formula and combination feeding — how does this change?

The question changes shape rather than going away. With a bottle you can see the volume, so “am I making enough” becomes “is my baby taking enough”, and weight still answers it. The NHS, AAP and La Leche League International figures in the table are written for breastfed babies, so read them with your midwife or pediatrician once formula is part of the day.

A visible number brings its own trap: coaxing in the last 20 ml from a baby who has already stopped. Volumes by age, and the signs a baby is finished, are in how much should a newborn eat.

For combination feeding, know one thing in advance. The NHS says introducing bottle feeds will reduce the amount of breast milk you produce, and the ABM’s feedback principle explains why: a bottle that replaces a feed is milk your body was not asked to make. That is not an argument against topping up. Formula is food, and a fed baby is the point. It is a reason to make the plan with a midwife or lactation specialist.

The WHO recommends exclusive breastfeeding for the first 6 months, and its complementary feeding guideline says breastfeeding should continue up to 2 years or beyond. Those are population-level recommendations, not a verdict on your kitchen.

What are the signs that something is genuinely wrong?

Uneven feeding in a baby who is weeing, gaining and alert is not one of them. The signs below are, and none of them is for watching another day.

What should I bring to the midwife or pediatrician appointment?

Three things, and none of them takes preparation if you wrote them down as you went: the diaper counts for the last few days, roughly how many feeds in each 24 hours, and every weight you have with its date. Then the appointment starts with reading numbers, not trying to remember them.

Add these if they apply:

• Whether feeding hurts, and on which side.
• Whether your baby is being topped up, how often and with how much.
• Anything that changed recently: a longer sleep stretch, a bottle introduced, fewer stools than last week.
• A request to be watched feeding. The NHS suggests asking for exactly that, and says a midwife, health visitor or breastfeeding specialist can help with position and attachment.

This is where a log stops being admin. Bunavi keeps the diaper counts and feeds in the shape the appointment asks for, and a shared log means both parents arrive with one set of numbers instead of two. It records. It does not interpret.

Six heavy diapers, yellow stools, a scale moving the right way, a baby content after most feeds. That is the whole answer, and none of it is visible at the moment you most want to know.

Questions parents ask

Does a baby who feeds every hour mean I have low milk?

Not on its own. The Academy of Breastfeeding Medicine describes milk volume as depending on feedback, so more milk removed means more milk made. The AAP's at least 8 to 12 feeds in 24 hours is a floor, not a cap. Diapers and weight are what settle it.

My baby only feeds for five minutes — is that long enough?

It can be. The NHS says to feed for as long as your baby wants. La Leche League International does list a baby who falls asleep shortly after starting to feed as a warning sign, so check diapers and weight, and ask for a feeding assessment if either looks off.

Can I tell how much milk my baby took by weighing them before and after?

Not in a way these authorities rely on. The AAP says you can't measure exactly how much milk a breastfed newborn takes, and points instead to the weight check at the first pediatric visit, no more than 48 hours after hospital discharge. Diaper counts cover the days between.

How many wet diapers should a two-day-old have?

Fewer than later on. The NHS says a baby is likely to have only 2 or 3 wet diapers in the first 48 hours, and La Leche League International looks for 2 by day two. The figure of at least 6 belongs to day 5 onward.

If I top up with formula, do the diaper counts still apply?

Keep counting, but read the numbers with your midwife or pediatrician. The NHS, AAP and La Leche League International write those figures for breastfed babies. Weight settles the question either way, so note what share of feeds is formula and bring the counts and weights along.