Feeding

Sucking is one of the first natural instincts a baby’s born with. It’s how they feed, and often how they soothe themselves too. 

In the early newborn days, getting to know this reflex and how to support it can help make feeding a bit easier for both of you. In this blog, we’ll break down what the sucking reflex is, why it’s important, and share a few simple, no-fuss ways to support it. 

What is the sucking reflex? 

The sucking reflex is an automatic response that kicks in from birth. When something touches the roof of your baby’s mouth (whether it’s a nipple, bottle teat or even your finger) they’ll instinctively start to suck, swallow and breathe in a rhythm that helps them feed. 

It’s a crucial part of early development. Not only does it help your baby get the nourishment they need, but it also strengthens the muscles in their mouth and jaw. That same reflex plays a big role in feeding, both breast and bottle, and even sets the foundation for things like speech and coordination later in their development.  

When does the sucking reflex kick in, and when does it fade? 

The sucking reflex develops early, starting around 32 to 36 weeks in the womb. That’s why some babies are spotted sucking their thumb before they’ve even made it earthside. 

After birth, it’s one of the key reflexes that helps them feed in those first few months. 

As your baby grows, you might notice they suck less during sleep or don’t root as quickly when something brushes their cheek. That’s a natural sign the reflex is starting to fade, and they’re beginning to feed more deliberately. 

Most babies begin to outgrow the automatic sucking reflex around the 4-month mark, as sucking becomes something they do with more control, whether it’s for feeding or comfort. 

How to support your baby’s sucking reflex 

In the early weeks, there are a few simple ways you can support your baby’s natural sucking reflex. 

• Start with skin-to-skin: Holding your baby close helps spark their instinctive reflexes, including sucking. It can also make latching onto the breast or bottle feel more natural. 
• Feed responsively: Look out for early feeding cues like rooting, hand-sucking or lip-smacking. Picking up on these signs early gives your baby the best chance to feed while their reflex is at its strongest. 
• Use a dummy if it helps: If your baby’s already been fed but still wants to suck, a dummy (or soother) can offer comfort. If you’re breastfeeding, it’s best to wait until things are well established (usually around 4 to 6 weeks) before introducing one. 
• Hunger or comfort?: A steady suck with swallowing usually means your baby’s feeding. If their sucking is slower and lighter, they might just be looking for comfort.  
• Trust your gut: You’ll get to know your baby’s cues before you know it. 

When to speak to a health professional 

The sucking reflex usually develops smoothly. But every baby is different, and some need a bit of extra support. 

You might want to speak to a health professional if you notice: 

• your baby struggles to latch at breast or bottle 
• feeding feels unusually slow, tiring, or stressful for either of you 
• they don’t seem to be sucking rhythmically or effectively 
• they’re not gaining weight as expected 

It’s also okay to ask for help if feeding just doesn’t feel right. 

Whether it’s trouble with latching or knowing if your baby’s sucking for food or comfort, support is available. Midwives, health visitors, lactation consultants, and feeding specialists are all there to help guide you through. 

Sources

• Why Do Babies Like Pacifiers & Sucking? – Happiest Baby Australia 

• Your baby’s reflexes and why they’re important | Infacol Colic Relief Drops | Say Goodnight to Colic & Griping Pain  

• Feeding development and difficulties : Reflexes involved in feeding