Four months is one of the most challenging sleep ages because of the 4-month sleep regression. This is a permanent neurological change where your baby's sleep cycles mature to resemble adult sleep — they now cycle through light and deep sleep and wake between cycles. This is not a phase that passes; it is a new baseline. The good news is that with the right approach, most babies can learn to connect sleep cycles gently.
Total Sleep
14 to 15 hours
Naps
3 to 4 naps
Wake Window
90 to 120 minutes
Bedtime
7:00 PM to 8:00 PM
Night Feeds
1 to 2 times
This is a sample schedule based on a 7:00 AM wake time. Shift all times proportionally if your baby wakes earlier or later.
| Time | Activity |
|---|---|
| 7:00 AM | Wake and feed |
| 8:30 AM | Nap 1 |
| 10:00 AM | Wake and feed |
| 11:30 AM | Nap 2 |
| 1:00 PM | Wake and feed |
| 2:30 PM | Nap 3 |
| 4:00 PM | Wake and feed |
| 5:15 PM | Catnap (30 to 45 min) |
| 6:00 PM | Wake and feed |
| 7:00 PM | Bedtime routine |
| 7:30 PM | Bedtime |
| 2:00 AM | Night feed (if needed) |
The 4-month regression is permanent. Sleep will not return to pre-regression patterns on its own.
Consistent sleep associations matter now. Whatever your baby needs to fall asleep, they will need again at every wake-up.
A dark room and white noise are your best tools for extending naps and overnight sleep.
Gentle methods like the Gentle Night Method can help your baby learn to connect sleep cycles without leaving them to cry.
The 3 to 4 Month Sleep Guide covers everything in this schedule plus detailed gentle methods, troubleshooting, and real-life scenarios.
The regression itself lasts 2 to 6 weeks. However, the underlying sleep cycle change is permanent. Without addressing sleep associations, the frequent waking may continue indefinitely.
Most sleep consultants recommend waiting until 4 to 6 months for any form of sleep training. Gentle methods that do not involve leaving your baby to cry can begin around 4 months.
This is the 4-month sleep regression. Your baby is now cycling through light and deep sleep like an adult and waking between cycles. They need to learn to connect cycles independently.
