Navigating months 3 & 4

Navigating Months 3 & 4

Understand what’s changing in your baby’s sleep — and what to look at next.

Around months 3 and 4, sleep can suddenly feel different. Naps may become shorter, night waking can increase, settling may get harder and routines that seemed to work before can stop working.

Often called the 4-month sleep regression, this period reflects important changes in how your baby sleeps and develops.

Navigating Months 3 & 4 explains what is happening during this transition and gives you a practical framework for responding without assuming every sleep change needs to be “fixed.”

Inside the guide

• What people mean by the “4-month sleep regression”

• How sleep changes around months 3 and 4

• Why naps may suddenly become shorter

• Why night waking can increase

• Changes in sleep cycles and patterns

• Wake windows and changing sleep needs

• Sleep cues and settling

• What to consider when your previous routine stops working

• How to approach naps, bedtime and overnight waking

• Practical troubleshooting for common sleep changes

• Safe-sleep guidance throughout

Instead of simply telling you to wait for the regression to pass, Navigating Months 3 & 4 helps you understand what has changed, what you can observe and what to consider next.

Designed specifically for parents navigating the transition around 3–4 months.

Digital PDF • Instant access after purchase

Educational information only, not medical advice.