When Can You Stop Waking Your Baby to Feed at Night?

The first time your baby sleeps four hours straight, you don't enjoy it. You lie there doing the math on the last feed and wondering whether you're supposed to wake them, because everyone at the hospital said every two to three hours and nobody said when that rule ends.

Why newborns get woken in the first place

Almost every baby loses some weight in the first few days after birth, and the job of those early weeks is to get it back. Mayo Clinic puts the usual window for regaining it at one to two weeks, and until then they advise feeding often, which can mean waking a sleeping baby, especially once it has been more than four hours since the last feed. The NHS says the same thing in plainer terms: feed at least 8 to 12 times in 24 hours, and wake your baby if you need to.

The reason this matters more for breastfed babies is supply. In the first weeks your body is still working out how much milk to make, and it takes its cue from how often the baby feeds. La Leche League points to research showing that successful lactation depends on eight or more feeds a day, day and night, through the whole first month. A long stretch of sleep in week one feels like a gift, but it can quietly cost you supply later.

There's also jaundice. Frequent feeds help a newborn clear bilirubin, which is why a sleepy, yellowish baby in the first week is exactly the baby you don't let sleep through a feed.

The three things your pediatrician wants to see

When you ask "can I stop waking them?", what your pediatrician or midwife is really checking is this:

• Your baby is back to their birth weight. The NHS expects this by about two weeks old. Some babies get there in ten days, some take the full fortnight, and a little longer isn't a crisis as long as the trend is up.
• The weight keeps going up at the checks after that. One good weigh-in isn't a pattern, which is why the advice is phrased as regained and gaining.
• Diapers look right. Plenty of wet diapers and regular poos mean milk is going in, whatever the clock says. (We walk through the diaper counts in is my baby getting enough breast milk?)

Once those three line up, Mayo Clinic's wording is that it's generally OK to delay feedings until your baby wakes up, and there's no extra number of hours you have to earn first.

What "let them sleep" looks like in practice

It doesn't mean your baby will sleep through the night, and it doesn't mean you should try to make them. La Leche League notes that many young babies take about a fifth of their daily calories overnight, so night feeds are still normal for months. What changes is who starts the feed: before the green light, your alarm does, and after it, your baby does.

A realistic version of the first few weeks after the green light is a baby who sleeps one longer stretch (maybe four or five hours) and then goes back to feeding every two to three hours for the rest of the night. Take the long stretch when it comes and don't read too much into it either way.

Daytime is a different story. Even after you stop waking for night feeds, keep offering the breast often during the day. Most babies still need those 8 to 12 feeds in 24 hours, and a baby who sleeps longer at night usually makes up for it before dark.

When you should keep waking them

Ask your care team before you stop the night wake-ups if any of these apply, because the general advice above assumes a healthy, full-term baby:

• Your baby was born early or small. Mayo Clinic notes that premature babies often don't show reliable hunger cues and have their own nutritional needs.
• Your baby has jaundice, or had it and is still being monitored.
• Weight gain has been slow, or your baby lost more than expected in the first days.
• Your baby is sleepy at the breast and feeds are short, which can mean they're not getting a full feed when they do wake.
• Your own supply is a worry. Night feeds are when prolactin runs highest, so dropping them early can set supply back.

In any of those cases the decision belongs to someone who has your baby's chart in front of them, which is a different thing from something being wrong.

Setting your reminders so they stop waking you too

If you're using an app to remind you when the next feed is due, this is the point where that reminder changes from helpful to annoying. In the first two weeks a nudge every three hours is doing a real job. After the green light, the last thing you want in the middle of the night is a phone buzzing at you while your baby finally sleeps.

MilkMode is built around exactly this stage. It times each feed and remembers which side you ended on, and its feed reminders are optional, so you can turn them on for the early weeks and off the moment your pediatrician says you can let your baby sleep. Its sleep mode goes one step further and keeps reminders quiet at night once your baby starts sleeping longer, so the app stays useful during the day without becoming one more thing that wakes you.

The reminders exist to get you through the weeks of regaining weight, and once you're through them, let the baby be the alarm.

Quick answers

When can I stop waking my newborn to feed? For a healthy, full-term baby, once they're back to their birth weight and gaining steadily, which is usually within the first two weeks. Check with your pediatrician or midwife before you stop, because they'll be looking at the actual weight checks.

How long can a newborn go without feeding at night? Until they've regained their birth weight, most guidance says to wake them if it's been more than about four hours since the last feed. After that, they can sleep until they wake on their own, though most still wake to feed every few hours for months.

Should I wake a sleeping baby to breastfeed? In the first one to two weeks, yes, because frequent feeds rebuild lost weight and establish your milk supply. After your baby has regained their birth weight and your care team is happy, you can let them sleep.

Does letting my baby sleep longer hurt my milk supply? It can in the early weeks, when supply is still being established and depends on feeding eight or more times a day. Once supply is established and your baby is gaining well, one longer stretch at night usually balances out with more frequent daytime feeds.

Keep reading

• How Often Should a Newborn Breastfeed?
• Is My Baby Getting Enough Breast Milk?
• Cluster Feeding: What It Is and How to Get Through It

This article is general information, not medical advice. Sources: Mayo Clinic, "Newborn sleep: Should I wake my baby for feedings?" (April 2025); NHS West Yorkshire Healthier Together, "How to tell if breastfeeding is going well"; AAP HealthyChildren.org, "How Often and How Much Should Your Baby Eat?"; La Leche League International, "Newborn Breastfeeding Frequency". If you have concerns about your baby's feeding, weight, or sleep, talk to your pediatrician, midwife, or a lactation consultant.