From swaddle to sleep sack
The swaddle has to go, and you are dreading it. Done one arm at a time it usually costs a week of slightly worse sleep rather than a fortnight of chaos.
3 min read
The point of the transition is that your baby has to get used to their arms being free at the moment of falling asleep. Doing that in one step removes the whole containment at once. Doing it in stages lets the startle reflex - which is fading anyway by this age - become manageable gradually.
Start when you see the first hints of rolling rather than waiting for it to happen. Being partway through the transition when rolling arrives is far better than starting from scratch that night.
The steps
One arm out, three or four nights. Usually the arm they suck or move most. Everything else stays exactly the same.
Then the second arm, three or four nights. The swaddle now works as a chest wrap. Many babies find this stage easier than the first.
Then into a sleeping bag. Arms free, body contained, and no loose fabric. Match the tog to the room.
Start at bedtime. Sleep pressure is highest and it is the easiest sleep to change. Naps can follow a few days later.
Change nothing else that week. Not the room, not the routine, not the schedule.
If it goes badly
Do not go back to a full swaddle once rolling has started - that is the one option that is off the table. What you can do is slow down: stay on one arm out for longer, or use a transitional bag with a poppable arm section, which gives some containment with the arms free.
Extra settling help during this week is entirely reasonable. A hand on the chest replicates a lot of what the swaddle was doing, and it is much easier to withdraw later.
Start the transition before you need to. Being halfway through when they first roll is a much better place to be.
How long
A week to ten days for most babies, with the worst of it in the first three or four nights. Some settle immediately and seem relieved. If two weeks pass with no improvement at all, look at wake windows before assuming the swaddle was the thing holding sleep together.
It is also worth remembering that the startle reflex fades naturally over these months. Some of the improvement you eventually see is simply your baby growing out of the thing the swaddle was solving.
What to expect from the first arm
The first arm out is usually the hardest of the three stages, and it typically costs two or three nights of longer settling and a bit more waking. That is the whole cost for most babies, and the second arm is frequently easier than the first because half the containment has already gone.
While you are in it, give more settling help rather than less. A hand resting on the chest replicates a good deal of what the swaddle was doing, and it is much easier to withdraw later than a new habit would be. If the nights are getting worse rather than better after four or five, hold at one arm out for a week before continuing.
Choosing a sleeping bag
Size matters more than anything else. The neck opening must be small enough that your baby cannot slip down inside the bag, and the armholes snug enough that they cannot pull an arm back in. Bags are sold by weight as well as age - go by weight.
Then match the tog to the room and the layers underneath: 2.5 tog for sixteen to twenty degrees, 1.0 for warmer, 0.5 above twenty-four. Most bags carry a chart on the label and it is worth reading the one you actually own, since they differ. And nothing weighted, at any age.
When to stop troubleshooting
Speak to your health visitor if sleep does not recover at all over several weeks, or if your baby seems distressed rather than unsettled. Snoring or noisy breathing that appears at the same time is unrelated to the swaddle and worth mentioning to your GP.
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