What Are the Different Sleep Regression Stages?

Sleep regressions catch many parents off guard. One week, the baby sleeps soundly through the night. The next week brings constant wake-ups and bedtime battles.

Understanding sleep regression stages helps parents recognize what’s normal and respond with confidence instead of worry.

The sleep regression timeline typically includes periods around 4 months, 6 months, 8-10 months, 12 months, 18 months, and 2 years. Each stage links to major developmental leaps in the baby’s brain and body.

The 5-mon...