Baby sleep at 9 months
they know you exist
Around 9 months, your baby sits up, grabs everything, and understands that you still exist when they cannot see you. Enough to shake up the nights for a few weeks.
The ranges at 9 months
| Range | At 9 months |
|---|---|
| Total sleep over 24 h | 12 to 16 hours |
| Naps per day | 2 |
| Wake window | 2 h 30 min to 4 hours |
Two naps, longer days
At this age, the two naps settle in, often one mid-morning and one early in the afternoon. Wake windows get longer, and the one before bedtime is often the longest.
Separation anxiety and waking
Between 6 and 10 months, several milestones overlap: sitting up, then understanding that a thing still exists when you cannot see it. You included. Separation anxiety follows from this: an absence that used to go unnoticed now gets noticed.
A child who knows you exist elsewhere may look for you between two sleep cycles. It is not a step back, it is a new skill that sometimes costs a few weeks of nights. The intensity varies enormously: some children go through this period with nothing changing at all.
What helps: peekaboo games, which teach through laughter that what disappears comes back, and short, announced departures rather than slipping away unnoticed.
Meals
From around 8 months, Santé publique France suggests very soft pieces that can be crushed between the tongue and the palate. Until age 5, nothing small, hard and round (like a peanut): risk of choking. The guide to starting solids.
Safe sleep
France's National Authority for Health (HAS, February 2020) recommends putting your baby to sleep:
- always on their back, on a firm mattress, in a cot with bars;
- in a suitable baby sleeping bag, with no pillow, duvet or blanket;
- with no cot bumper, positioner, soft toy or comforter in the cot;
- in a room at 18 to 20 °C, free of tobacco smoke;
- ideally in the parents' room for the first 6 months, in their own cot: no bed sharing.
When to talk to a doctor
See a doctor if your baby consistently sleeps much less than these ranges, is hard to wake or drowsy all the time, or if their sleep comes with loud snoring, pauses in breathing or a drop in their growth curve.