14 July 2025 · Roshni Mahtani Cheung
Cofounder, Little Rei · Mother of one
Why Does My Baby Cry When Put Down?
Forty minutes asleep on your chest. Two seconds on the mattress. Awake, furious, back to the beginning.
She isn't being manipulative, difficult or spoilt. A newborn can't be any of those. She's doing something completely predictable, for reasons clear enough that you can work with them.
Why it happens
There are six, and not one has anything to do with her character. I found that comforting at the time, because at three in the morning the only explanation that comes to mind is that you've somehow made a difficult baby.
- Human infants are born early relative to other mammals, and the first months are effectively a continuation of gestation. Being held is the expected environment; being alone on a flat surface isn't.
- The startle reflex. Lowering a baby triggers a sensation of falling, and the arms fly out, which wakes them. This fades by around four to six months.
- Temperature and texture. Your chest is warm and moving; a mattress is cool and still. The change is abrupt.
- Smell and sound. Your scent, heartbeat and breathing have been constant since before birth, and their absence registers.
- Sleep cycles. Newborns enter light active sleep first and only reach deep sleep after about twenty minutes, so a transfer at five minutes is a transfer during the lightest phase.
- Reflux, in some babies, which is more uncomfortable lying flat.
The transfer, properly
Both matter, but timing matters more than technique, and timing is the part nobody teaches you. Waiting about twenty minutes, until she's in deep sleep, makes the biggest difference.
- Wait twenty minutes. The most effective change. Limbs go floppy and a lifted arm drops without resisting, which is the signal that deep sleep has arrived.
- Feet first, then bottom, then back, then head. Lowering head first triggers the falling sensation.
- Keep a hand on their chest for thirty seconds after they're down, so the contact fades out gradually and doesn't simply stop.
- Stay bent over them for a moment before you straighten up.
- Warm the sheet with your hand first, so the surface isn't a cold shock. Never use a hot water bottle or heated pad in the cot.
- Swaddle, if they take to it, arms in, hips loose, which contains the startle that undoes the transfer.
- Try side-lying to settle, then roll them onto their back once asleep. They sleep on their back; the settling position can differ.
The other crying patterns
When it still fails
Some babies just won't be put down for naps in the early months. No technique reliably changes that, and it doesn't mean you're doing the transfer wrong.
Shan was one of them. I read a great deal about the twenty-minute rule and executed it beautifully, and she woke every time, and eventually I understood I was losing the same fifteen minutes four times a day for nothing.
So stop fighting it, and plan the day around it instead.
- Contact naps in a carrier. Hands free, and the baby sleeps. Upright, chest to chest, face visible, chin off the chest, and you stay upright and awake throughout.
- Take shifts. One adult holds while the other does something else, and swap.
- Aim for one transfer a day and let the others go. Usually the first nap of the morning, which is the easiest.
- Accept the season. This is a stage with an end, generally easing between three and five months as sleep matures.
A great many people do what I did and almost nobody admits it. Shan wouldn't sleep. I don't know how many nights we did it, twenty perhaps, possibly more. I'd tried everything above, plus several things that aren't on any list. At one in the morning I would strap her into the car seat, drive up and down the highway until she went off, carry her in and transfer her to bed. It worked nearly every time, which is exactly why I kept doing it. I want to say two things about that.
I was driving while severely sleep-deprived, which is a risk to other people, not only to the two of us. We've written elsewhere that not being able to remember the last stretch of road is microsleep, and that it belongs in the same category as drink-driving. I didn't think about it in those terms at the time. I do now.
A car seat isn't a sleep surface. It's the right place for her while the car is moving, and that part isn't negotiable. But a baby left to sleep in one for long stretches is half upright, so her chin can drop towards her chest. The guidance is to take her out once you've stopped, which is the one part of this I did get right.
If you're doing the drives, I understand completely, and it'll probably work. I'd still tell you to find another way. Wake the other adult and hand the baby over. Same trick, nobody in a car.
Holding a sleeping baby is fine, and often the only thing that works, as long as you're awake and sitting up. The holding isn't the danger.
The danger is falling asleep yourself while you hold her, and that always happens on a sofa or in an armchair.
- Never on a sofa or armchair. Falling asleep with a baby on a sofa is the single highest-risk sleep situation there is, by a wide margin.
- If there's any chance you'll doze off, put the baby down first. Setting an alarm, or holding them somewhere upright and uncomfortable, isn't a plan.
- In a carrier, stay upright and awake, and recheck the position once they fall asleep. A sleeping baby goes floppy and can slump chin to chest.
- For longer or unsupervised sleep, move them onto a firm flat surface, on their back, in a clear cot.
- If you're exhausted enough that dozing is likely, the safest option is to put the baby down in the cot and sleep yourself, even if they protest.
Working towards being put down
None of this needs doing in the first six weeks, and nothing you do in those weeks forms a habit you can't change later.
Responding to a newborn doesn't make her dependent. That isn't how it works at this age, whatever anybody tells you at a family gathering.
From three or four months, if you want to move towards her falling asleep on her own, go gradually.
- Put them down drowsy and not fully asleep, once a day, at the easiest sleep of the day.
- Reduce the contact by degrees: rocking to nearly asleep, then to drowsy, then a hand on the chest, then presence in the room.
- Keep something consistent that isn't you: a short phrase, a sleep sack, the same low sound.
- Expect it to take weeks and to regress during teething, illness and developmental leaps.
Mention it to a doctor if she can't be put down at all past about four months, if she arches and screams when laid flat (which is different from waking), if weight gain has flattened, or if she vomits forcefully after most feeds.
Reflux, and a few other treatable things, look exactly like an unusually strong preference for being upright.
Where this comes from
- NHS. Soothing a crying baby
- The Lullaby Trust: Safer sleep advice
- NHS. Reducing the risk of sudden infant death syndrome
This guide is general information, written to help you understand a topic and ask better questions. It is not medical advice and does not replace your own doctor, midwife or paediatrician. Anything that worries you about your baby belongs with them.