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0–12 Month Baby Sleep Guide: What’s Normal Month by Month

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Baby sleep changes almost every month during the first year. Newborns sleep in short, unpredictable stretches, sleep patterns begin forming around 3 to 4 months, and night wakings remain common during teething, mobility, and separation anxiety. By 12 months, some babies sleep through the night, but many still wake occasionally, which is developmentally normal.

0–1 months
Sleep is frequent and unpredictable. Newborns do not have a circadian rhythm yet and need to wake often to eat.

2–3 months
Longer nighttime stretches may start, but consistency is still developing. Day and night confusion is common.

4–5 months
Sleep cycles mature and patterns begin forming. Increased night wakings often appear during this stage.

6–7 months
Some babies sleep longer stretches, but teething, growth spurts, and increased awareness often disrupt sleep.

8–9 months
Separation anxiety peaks. Babies may wake and need reassurance even if they previously slept well.

10–11 months
Mobility and brain development increase. Standing, cruising, and early morning wakeups are common.

12 months
Some toddlers sleep through the night, many still wake occasionally. Illness, travel, and routine changes often affect sleep.

If your baby wakes at night, it does not mean something is wrong. Sleep development is not linear, and changes during the first year are normal.

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