Newborn sleep is famously chaotic — and yet there is a developmental arc that makes sense once you can see it. Here is a realistic week-by-week guide for the first 12 weeks, with wake windows, total sleep, and notes on what is normal.
Weeks 0–2: Survival Mode
Total sleep: 16–18 hours per day. Wake windows: 30–60 minutes. There is no schedule — just feed, sleep, repeat. Day-night confusion is normal. Focus on feeding, skin-to-skin, and surviving.
Weeks 2–4: Faint Signs of Pattern
Total sleep: 15–17 hours. Wake windows: 45–75 minutes. You may notice a slightly longer night-time stretch (3–4 hours). Begin distinguishing day and night by exposing baby to bright light during the day and dim light at night.
Weeks 4–8: First Real Patterns
Total sleep: 14–16 hours. Wake windows: 60–90 minutes. A 4–6 hour overnight stretch becomes possible. Naps are still short (30–45 min). Start a tiny bedtime routine: dim lights, swaddle, lullaby.
Weeks 8–12: A Schedule Emerges
Total sleep: 14–15 hours. Wake windows: 75–120 minutes. Many babies have a 6–8 hour overnight stretch. Naps may extend. Bedtime can shift earlier (7–8 PM). The 4-month sleep regression often arrives at the very end of this window.
Use Music to Anchor Sleep
From around week 4, the same lullaby sung at every nap and bedtime becomes a powerful sleep cue. The brain learns the song = sleep is coming, and falls asleep faster within weeks.