Why breastfed babies reject almost every pacifier – and the mistake 9 out of 10 parents make

A midwife explains why it's not the baby's fault when the fifth pacifier ends up in the trash – but due to a detail that hardly any manufacturer takes seriously.

It's just after eight when I ring the doorbell for a postnatal visit. The mother who opens the door has her baby in her arms and dark circles under her eyes. Five pacifiers lie on the kitchen table. Five different brands, all bought in original packaging, all rejected.

"He won't take any," she says. "I can't put him down for a second. I must be doing something wrong."

I've heard this sentence for years – almost every week, in almost every family with a breastfed child. And almost always, I answer the same: You're not doing anything wrong. And your baby isn't "pacifier-averse." He's not rejecting the pacifier – he's rejecting the wrong shape.

The myth of the "baby who doesn't like pacifiers"

Many parents eventually believe their child simply belongs to the babies who "don't take a pacifier." They try three, four, five models, give up – and carry their baby through every sleep phase for months, because only the breast calms them.

What hardly anyone explains to parents is that a breastfed baby has learned a very precise sucking pattern in the first weeks of life. At the breast, the tongue shapes itself around a soft, yielding form, the jaw works in a wave-like motion, and the baby determines how deeply it latches on. A conventional pacifier feels foreign to this trained pattern – too hard, too short, wrongly shaped. The baby notices the difference immediately. So: out it goes.

Why shape determines acceptance – and more

However, the shape not only determines whether a pacifier is accepted. It also determines what long-term effects it has on the mouth. Speech therapists regularly see the consequences of unfavorable pacifier shapes in their practice: a tongue resting in an incorrect position, a jaw growing under constant pressure.

That's why midwives and speech therapists look at three things when choosing a pacifier, which are rarely listed on the packaging:

What we made of it

It was precisely from this practical experience that the Nuckly NatureSense was born – a pacifier developed in collaboration with midwives and speech therapists. Not as another design on the shelf, but with a single goal: it should feel to the baby like what it knows. As close as mom.

The result is a deliberately reduced pacifier: a breast-like, particularly soft nipple shape that allows the baby to maintain its familiar sucking pattern, a lightweight design without hard pressure edges – and a shape that supports natural jaw development instead of working against it.

The difference is usually apparent in the first few minutes: many babies who previously spat out every pacifier take to the NatureSense on their own – and equally importantly: they don't become constant pacifier users, because the shape satisfies the need instead of artificially prolonging it.

What parents report

"What if my baby still rejects it?"

I hear that question often – understandable, if five pacifiers have already landed in the trash. That's why the NatureSense is available in the Starter Set: two pacifiers plus a guide and weaning book, in which we explain exactly how to successfully introduce it to breastfed babies – from the right time to common mistakes in the first few days. Most babies accept it. And if not, we offer personal help until it works.

One last word: No pacifier in the world can replace closeness. But a good pacifier gives you back those moments when you can simply have both hands free – or an hour of sleep. And in the first few months, that's worth more than anything else.

Nadia John has been a midwife for many years, supporting families through pregnancy and the postnatal period, and co-developed the Nuckly NatureSense.