Enter your baby's age to get an evidence-based estimate of how much sleep they need, how often they'll wake at night, and what sleep pattern to expect. Based on paediatric sleep science.
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Newborns have sleep cycles of just 45-50 minutes, compared to 90-110 minutes in adults. This is why babies wake so frequently — they naturally rouse between cycles and must learn to self-settle, which typically develops between 3 and 6 months.
Infant sleep patterns are regulated by circadian rhythms which start developing around 6 weeks of age. Unlike adult sleep, infant sleep is heavily dominated by active REM sleep, allowing fast-paced neural path growth during early development.
Newborns have not developed melatonin pathways, meaning they lack circadian rhythms and sleep in short bursts across 24 hours.
Infants spend up to 50% of sleep in REM (active) phase, where dreams and neurological integration occur, compared to 20% for adults.
Most babies can physically sleep longer stretches (6 hours) by 6 months, though night feedings are normal up to 12 months.
At 4 months, a major shift occurs as baby sleep stages organize into adult-like light and deep sleep stages, causing temporary wakes.
Newborns need 14 to 17 hours of sleep in a 24-hour period, waking every 2 to 3 hours to feed due to small stomach capacities.
This varies. Paediatric guidelines suggest many babies can sleep 6-8 hour stretches between 6 and 9 months, depending on weight and bedtime habits.
Yes, for newborns under 4 weeks, wake them every 3-4 hours to feed until they regain birth weight and get clear clearance from their doctor.
A phase where a baby who previously slept well starts waking frequently. Regressions align with developmental milestones like rolling, crawling, or brain growth shifts.