Rolling Over!
Your baby is becoming mobile! The first rolls from tummy to back are coming, and everything within reach ends up in their mouth. A little explorer has arrived.
Development
- Rolls from tummy to back — the first major motor milestone
- Reaches purposefully and brings toys to their mouth
- Cause and effect: Discovers that actions produce results (shakes rattle → sound!)
- Steady head control in all positions
- Mental leap (week 19): "World of events" — major development
Growth
- Boys: Average 14.8 lbs / 25.6 in (6.7 kg / 65 cm)
- Girls: Average 14.1 lbs / 24.8 in (6.4 kg / 63 cm)
Sleep
- 12–15 hours per day
- 4-month sleep regression: Sleep patterns change. Your baby sleeps more lightly and wakes more often. This is normal and will pass
- The brain is reorganizing sleep cycles, and consistent routines are especially important now
Feeding
- 5–7 feeding sessions per day
- Your baby may become distracted during feeds — a calm, dimly lit environment helps
- Solid foods are not yet appropriate. The WHO and AAP recommend starting solids around 6 months of age
- Vitamin D: Continue with 400 IU (10 micrograms) daily
Good to Know
- The 4-month sleep regression is tough, but it is a developmental phase, not a setback
- Your baby can roll unexpectedly — never leave them unattended on a changing table
- Everything goes into the mouth now — this is how your baby explores the world
Activity Tips
Place toys just out of reach on the floor. Watch your baby stretch, try to reach — and maybe roll for the first time! Keep the camera ready.
Explore on Babysential
- Sleep Tracker — Important to track during the regression
- Milestones — Log that first roll!
- Baby — All baby guides and tools
Tip: Keep routines consistent through the regression. It passes, usually within 2–4 weeks.