How to Get Your Baby to Open Mouth Wider for a Better Latch
Struggling with how to get your baby to open their mouth wider to latch?
You already know that opening wide can help your baby get a deeper, more comfortable latch — but knowing your baby needs to open wide and knowing how to actually help them do it are two different things.
Most babies can open wider. The trick is giving them the right cue — in the right order.
And the cue you may have been taught can actually trigger sucking before your baby has finished opening their mouth.
That’s why some babies clamp, chew, or pull the nipple into their mouth instead of opening wider first.
In this post, I’ll show you what cue helps your baby open wider, why lip stroking can backfire, and how to time the sequence so sucking begins after the gape is finished.
This post is for babies who already open their mouths but need help opening wider for a deeper, more comfortable latch.
If your baby will not open their mouth at all, start with this blog instead.
Why Babies Don’t Open Wide to Latch
When your baby won’t open wide enough to get a good latch, it’s usually not because they can’t — it’s because their reflexes are being cued in the wrong order.
Most parents are taught to stroke the nipple down their baby’s lips to get the mouth open.
But you may have noticed that as soon as your nipple touches your baby’s lips, they clamp, chew, or suck your nipple inside.
They don’t open wide.
The reason? Touching the lips cues the sucking reflex — not the open-your-mouth-wide (gaping) reflex.
If you’ve been wondering how to help your newborn open wide to latch, the key is knowing that your baby needs two reflexes to work together — in the right order.
The gaping reflex tells your baby to open wide and get ready to feed. The sucking reflex tells your baby to close their mouth, create a vacuum, and start swallowing. Together, these reflexes make feeding effective and comfortable.
If you skip over the gaping reflex, your baby may still latch — but it will be with a narrowed mouth that pinches your nipples and makes feeding harder than it needs to be.
That’s why the next step matters: learning how to cue the gaping reflex first, so your baby opens wide before sucking begins. Let’s look at exactly how to do that.
How to Use the Gaping Reflex to Get Your Baby to Open Wide
It’s actually pretty simple once you know this: the gaping reflex comes from a cue to your baby’s chin — not their lips.
When your baby plants their chin against your chest or breast tissue, you’ll usually see a big, yawn-sized, wide-open mouth.
As they move forward and your nipple finally goes inside, they begin to close down — but now, all the extra tissue inside their mouth keeps it wide and supported.
That’s what creates the deeper, more comfortable latch you’ve been trying to get — without the pinching. This simple shift is key if you’ve been wondering how to help your baby or newborn open wide for breastfeeding.
Now that you know the “why” and the “how,” let’s look at it in real time — so you can see both reflexes working together step by step.
Video: What It Looks Like When Your Baby Opens Wide to Latch
Let’s look at what happens when you use a chin-first approach to cue the gaping reflex with a baby less than a week old.
It’s a short video because the process happens quickly in real life, so you may want to slow it down the first time you watch.
Notice how this baby plants their chin, opens wide, and then comes forward so the nipple can enter their mouth and sucking can begin.
And the most amazing part? This brand-new baby is doing almost the whole process on their own.
- No stroking the nipple
- No compressing the breast or chest
- No shoving the nipple into the baby’s mouth
This parent simply let the gaping reflex do its job, and only stepped in at the very end with a gentle assist.
You don’t have to make or teach a baby to open wide to latch. In fact, you couldn’t even if you wanted to.
What you can do is cue your baby’s reflexes in the right order — and then let them do the important work they were designed to do. And they will.
Next, let’s break this process down step-by-step so you can practice it with your own baby.
Step-By_Step to Getting Your Baby to Open Wide
Now let’s slow the sequence down and look at each part one step at a time, so you can see how the reflexes work together and practice it with your own baby.
Step 3: Mouth Opens Wider
With the nipple out of the way, the baby keeps opening until their mouth is as wide as a yawn.
Step 6: Latch Feels Better
Your baby settles into a deeper, more comfortable latch — and feeding feels better for both of you.
This is the sequence that helps turn a narrow, pinchy latch into a wider, more comfortable one.
The steps look simple in pictures, but real babies bring movement, hunger, impatience, and their own ideas about how feeding should go. You may need a few tries to get the timing right.
Tips for Open Wide Success
Helping your baby open wide for breastfeeding goes best when you set the stage first — especially when you’re trying something new.
The steps themselves are simple — chin contact before the nipple — but there are lots of little things that can make this seemingly easy shift harder than it looks.
Here are a few quick suggestions that often make things easier:
- Pick a calm moment. Practice when you and your baby are relaxed, not in the middle of a 3 a.m. meltdown.
- Bring baby to you. Make sure you’re bringing your baby to your body — not trying to push your nipple into their mouth.
- Look for progress. The goal is wider. More open is progress — it doesn’t have to be perfect on the first try. It will get better with practice.
- Keep it short. A minute or two of practice is enough. If your baby gets upset, pause, soothe, and try again later.
And now it’s time to try this with your own baby. You really can’t do it wrong — you’re simply learning what works best for both of you.
Next, let’s talk about what to do if opening wide is still hard — and the common challenges parents run into when practicing chin-first positioning.
What If Your Baby Still Doesn’t Open Wide?
The chin-first cue may make an immediate difference, but it will not work perfectly for every baby on the first try.
If your baby opens wider sometimes, keep practicing during calm feeds and notice what changes when it works.
If your baby still will not open their mouth at all — or their gaping response seems weak, delayed, or inconsistent — start with this guide to rebuilding the gaping reflex.
If your baby opens but still struggles to open widely or stay open while latching, there may be something else getting in the way. This troubleshooting guide will help you figure out what to look for next.
A wider latch can feel like an immediate change, but small improvements count too. Less pinching, an easier attempt, or a calmer feed are all signs that you and your baby are moving in the right direction.
Want More Support?
If this blog was helpful, here are a few related posts you might like.
âžś Why Your Baby Still Isn’t Opening Wide — And What to Try Next
đź”’ Baby Won't Open Wide? Get the Gaping Reflex Back On Track
đź”’ Go Deeper: How to Get a Good Latch
đź”’ Expanded Access resources go deeper to help you solve your latching and feeding problems. Click here to learn more about what’s inside.
Frequently Asked Latching Questions
