You have noticed it. One person picks up your baby and they immediately settle. Another person holds them and they squirm, fuss, and crane their neck looking for you. A relative who has been around babies their whole life cannot seem to get your baby to stop crying. Your partner’s coworker holds them for thirty seconds and they fall asleep.
It is not random. It is not luck. And it is not about how much someone loves your baby.
There is real science behind why certain people just click with certain babies — and understanding it tells you something important not just about your baby, but about yourself as their parent.
Babies Are Reading People Constantly
From the earliest weeks of life, your baby is running a continuous, sophisticated social assessment of every person they encounter. They cannot speak. They cannot sit up. But they are processing social information at a rate and depth that most adults significantly underestimate.
What they are reading:
- Nervous system state — whether the person holding them is calm or tense, regulated or anxious. This is transmitted through muscle tension, breathing rate, heartbeat, and the quality of movement.
- Vocal tone — not the words, but the rhythm, pitch, warmth, and consistency of how someone speaks. This tells a baby a great deal about whether this person is safe.
- Responsiveness — whether the person holding them adjusts to their cues or ignores them. A baby who turns their head away from eye contact is sending a signal. Someone who backs off when that happens registers as attuned. Someone who keeps pushing registers as unsafe.
- Predictability — whether the person’s movements, sounds, and responses are consistent. Predictability is safety to a nervous system that is still learning what the world is.
Your baby is not making judgments in the way an adult would. They are doing something more fundamental — assessing whether this person’s nervous system feels like a safe place to be.
Co-Regulation: The Science Behind the Click
The reason certain people calm babies so effectively comes down to a concept called co-regulation.
Newborns and young infants cannot regulate their own nervous systems. They are entirely dependent on the nervous system of a calm, regulated caregiver to help bring their own state into equilibrium. This happens through proximity, touch, voice, and rhythmic movement — and it works because the baby’s immature nervous system literally synchronizes with the caregiver’s more regulated one.
This is why a tense, anxious person often makes a fussy baby fussier. Their nervous system state is transmitted directly. The baby picks it up not as information to be interpreted but as a felt experience — and if the feeling coming from the person holding them is one of agitation, their own system responds in kind.
And it is why a calm, grounded person — someone who is genuinely unhurried, whose breathing is steady, whose muscle tone is relaxed — can sometimes settle a baby that no one else could. They are not doing anything special. They are simply in a state that the baby’s nervous system can borrow.
The Canadian Paediatric Society emphasizes the role of responsive caregiving in early infant development — the understanding that how adults respond to and interact with babies has direct effects on their neurological and emotional development.
Why Some Adults Are Naturally Better at This
Some people are naturally more regulated, more patient, or more comfortable with infants. This is not a personality virtue — it is a combination of temperament, experience, and their own nervous system history.
People who tend to click easily with babies often share some common qualities:
They are comfortable with silence and stillness. They do not feel compelled to fill every moment with stimulation, noise, or interaction. They can simply hold a baby without performing for them.
They follow rather than lead. They watch what the baby does and respond to it, rather than imposing an agenda. If the baby looks away, they look away. If the baby makes a sound, they echo it. This attunement is deeply calming to an infant.
They have a regulated nervous system. This is not about being a calm person in general — it is about being able to access a calm state when holding a baby. People who have done significant emotional work, who have secure attachment histories themselves, or who simply have low baseline anxiety tend to transmit that state.
They are not anxious about the crying. Infant crying triggers a stress response in most adults — it is biologically designed to. But people who can tolerate the sound without becoming dysregulated themselves are better able to remain the calm presence the baby needs to settle.
They have experience. Confidence with infants comes from time spent with them. Someone who has raised children, worked with babies professionally, or spent significant time around infants simply moves and responds differently — and babies register that competence as safety.
What This Means for You as the Parent
Here is the part that matters most: your baby’s preference for you is not just sentiment. It is neuroscience.
You are the person whose nervous system your baby has been co-regulating with since birth. You are the most familiar voice — they have been hearing you since approximately 18 weeks in the womb. You are the most predictable presence in their environment. Your smell, your heartbeat, your particular rhythm of movement — all of it is deeply known to your baby in a way that no one else can replicate.
When your baby settles immediately with you and fusses with someone else, that is not a reflection of your caregiving. It is a reflection of the attachment that has already formed. You are their safe base. Everyone else is assessed against that baseline.
This also means that the moments when someone else cannot settle your baby are not failures — yours or theirs. They are simply evidence that your baby knows the difference between familiar and unfamiliar, and has a preference.
The Stranger Anxiety Phase
Around eight to twelve months, most babies go through a period of pronounced stranger anxiety — a sudden wariness of unfamiliar people that can feel alarming if you are not expecting it. A baby who previously went happily to anyone may suddenly cry when held by grandparents they have met multiple times.
This is not regression. It is developmental progress.
Stranger anxiety is a sign that your baby has developed object permanence — the understanding that things and people continue to exist when out of sight. It is also a sign that they have a clear, established attachment to their primary caregivers and are now able to distinguish between safe, known people and everyone else.
The babies who develop the clearest stranger anxiety are often the babies with the most secure attachment — because they have a very clear internal model of what safe looks and feels like, and they are alert to deviation from it.
It passes. And while it is happening, the most helpful thing you can do is remain calm and present when your baby is meeting new people. Your regulated response tells them whether the situation is safe. If you are relaxed, they register that information.
When Your Baby Seems to Prefer Someone Else
Occasionally parents notice that their baby seems to prefer another caregiver — settling faster with a partner, a grandparent, or a childminder than with them. This is more common than people admit and more complicated than it appears.
A few things it might reflect:
The other person is less anxious. Primary caregivers — particularly mothers in the early postpartum period — are often carrying significant anxiety, sleep deprivation, and emotional load. A partner or grandparent who arrives fresh and unhurried may simply be in a more regulated state.
The other person represents novelty. A baby who is entirely comfortable with their primary caregiver may actually settle faster with someone new because the novelty is engaging rather than alarming — particularly in the three to five month range before stranger anxiety develops.
You are reading settling speed as preference. A baby who takes longer to settle with you than with someone else is not expressing a preference for the other person. They may simply be expressing more of their full emotional range with you — because you are the person they feel safest doing that with. The baby who cries with mum and settles with dad is not closer to dad. They are saving their biggest feelings for the person they trust most to handle them.
This last point is worth sitting with. Babies do not perform for their primary attachment figures the way they sometimes do for others. The fact that your baby is more demanding with you is often a sign of security, not dissatisfaction.
How to Be the Person Your Baby Clicks With
If you want to deepen your attunement with your baby — or support other caregivers in building their connection — the principles are the same:
Slow down. Move more slowly than you think you need to. Speak more quietly. Take a breath before you pick them up.
Follow their lead. Watch what they do before you respond. Let them set the pace of interaction.
Regulate yourself first. Before you try to calm your baby, check in with your own state. If you are tense, stressed, or running on fumes, your baby will feel it. Even 30 seconds of slow breathing before picking them up changes what you are transmitting.
Be consistent. Predictability is safety. The more reliably you respond to your baby’s cues — the more consistently they experience you as someone who shows up — the more their nervous system can relax in your presence.
Reduce stimulation when in doubt. When a baby is unsettled, the instinct is often to do more — more movement, more sound, more faces. Often the opposite works better. Dim, quiet, still, and held.
The foundation of all of this is the relationship you are already building with your baby — one response at a time, one feed at a time, one 3am at a time.
→ Read our Signs of a Highly Intelligent Baby guide — what early development actually tells you about your baby’s growing awareness.
→ Read our Mental Load of New Motherhood guide — the invisible labour of new parenthood and what support actually looks like.
→ Read our 7 Basic Needs of a Child guide — the developmental framework every new parent should know.
→ Shop the Cradle Song Co collection — curated essentials for pregnancy, postpartum, and baby’s first year.
