Parents come to my clinic around their child’s first birthday convinced they’re in a sleep regression. The familiar pattern: bedtime suddenly takes 45 minutes instead of 10, the morning nap becomes a battle, the afternoon nap collapses into a 25-minute disaster, and night sleep gets shorter on both ends.
In about 80% of the cases I see at this age, this isn’t a regression. It’s a nap transition.
The biology
Most babies between 12 and 18 months consolidate from two daytime naps to one. The window is wide; some are ready at 12, some not until 17. The sign you’re approaching it: the morning nap starts pushing the afternoon nap later, which pushes bedtime later, which makes morning wake-up earlier, which compresses everything.
How to know which you’re dealing with
It’s a nap transition (not a regression) if:
- The morning nap is suddenly hard to land.
- The afternoon nap, when it happens, is short and unrestful.
- Total daytime sleep has dropped by an hour or more in the last two weeks.
- Your child is generally cheerful between naps despite less sleep.
It’s a regression (not a transition) if:
- Both naps are still happening but night sleep is fragmented.
- Your child is unusually clingy, marshmallowy, or feverish.
- The disruption coincides with teething, illness, or a major change at home.
The one-nap transition, practically
- Push the morning nap later by 15 minutes every 3–4 days. Aim for 11:30–12:30 start.
- Skip the afternoon nap. This is brutal for about 7 days.
- Earlier bedtime, especially during the transition. 6:30pm bedtime is normal during the switch.
- Expect 2–3 weeks of bumpy sleep before the new pattern settles.
Most children land at one ~90-minute nap starting around noon, with night sleep of 11–12 hours. That’s the steady state until ~3 years old.