Quiet sleep is the deeper, non-REM stage of infant sleep, in which a baby lies still, breathes slowly and regularly and is harder to wake. It alternates with active sleep throughout the day and night.
Key takeaways
- Babies in quiet sleep are less likely to wake when put down.
- The share of quiet sleep grows as babies get older.
- Around 3 to 4 months, quiet sleep develops into distinct deeper and lighter stages, as in adults.
Frequently asked questions
Many parents find babies transfer more easily once they are in quiet sleep, with relaxed limbs and steady breathing.