Baby Not Sleeping Through the Night
The short answer
Waking during the night is biologically normal for babies and does not mean something is wrong. Most babies are not developmentally ready to sleep a full 8-12 hour stretch until at least 6 months of age, and many healthy babies continue to wake once or twice a night well into the first year.
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By Age
What to expect by age
0-3 months
Newborns are supposed to wake frequently. Their tiny stomachs need refilling every 2-4 hours, and their sleep cycles are only about 40-50 minutes long. Night waking at this age is a protective mechanism and a sign of healthy development, not a problem to solve.
4-6 months
Sleep architecture is maturing and many babies begin to consolidate longer stretches at night, but 1-3 night wakings are still completely normal. The well-known "4-month sleep regression" is actually a permanent shift in sleep patterns, so things may feel harder before they get easier.
6-9 months
Some babies this age can go 6-8 hours without a feed, but many still benefit from one overnight feed. Teething, separation anxiety, and new motor skills like sitting and crawling can all temporarily increase night waking. If your baby was sleeping longer stretches and starts waking more, it is usually developmental and passes.
9-12 months
By now, most babies are physiologically capable of going without overnight feeds, though some still genuinely need one. Sleep disruptions at this age are commonly linked to standing, cruising, and the major cognitive leap of object permanence. Consistent, gentle bedtime routines continue to be the most evidence-based approach.
12-24 months
Toddlers who still wake once at night are within the range of normal, especially during illness, teething, or big transitions like dropping to one nap. If your toddler is waking frequently and seems truly distressed or excessively tired during the day, mention it to your pediatrician to rule out things like ear infections, reflux, or obstructive sleep issues.
What Should You Do?
When to take action
- Your baby is under 6 months and wakes to feed during the night
- Night waking increased around a developmental milestone like rolling, sitting, or crawling
- Your baby wakes briefly but settles back to sleep within a few minutes with minimal help
- Night waking coincides with teething, illness, or a schedule change like travel or daylight saving time
- Your baby is growing well, happy during the day, and meeting milestones
- Your baby is over 9 months and waking more than 3-4 times per night consistently, and you're concerned about how it's affecting their daytime function or your own wellbeing
- Your baby seems to wake gasping, choking, or with very noisy breathing
- You've noticed your baby is excessively sleepy during the day despite seemingly spending enough time in bed at night
- Night wakings are accompanied by inconsolable crying that lasts more than 30 minutes and you can't identify a cause
- Your baby stops breathing during sleep or has pauses in breathing that last longer than 20 seconds
- Your baby is very difficult to wake from sleep, seems limp, or has a blue or grey tinge around the lips
- Night waking is accompanied by a high fever, projectile vomiting, or other acute illness symptoms
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Sleep Concerns
How Long Should Baby Be Awake Between Naps?
The ideal awake time between naps (called a "wake window") increases as your baby grows. Newborns may only handle 45-90 minutes awake, while toddlers can manage 4-6 hours. Getting wake windows right is one of the most effective ways to improve nap quality, because both too-short and too-long wake times lead to poor sleep.
Is a Bath Before Bed Really Necessary?
A nightly bath is not medically necessary and some babies with sensitive skin do better with less frequent bathing. However, a warm bath can be a powerful sleep cue because the subsequent body temperature drop triggers melatonin production. If you include a bath, keep it calm and warm rather than stimulating.
How Long Should the Bedtime Routine Be?
An ideal bedtime routine for babies and toddlers is 20-30 minutes. Shorter routines may not give enough time to wind down, while routines longer than 45 minutes can become a stalling tactic. Consistency in the routine order matters more than exact length.
Is My Baby's Bedtime Too Early?
For most babies over 3 months, bedtime between 6:00-8:00 PM is appropriate. A bedtime that is too early can cause early morning wakings (before 6 AM) or long periods of wakefulness in the middle of the night. However, during nap transitions or on days when naps were short, an earlier-than-usual bedtime helps prevent overtiredness.
Is My Baby's Bedtime Too Late?
For babies over 3-4 months, consistently going to bed after 8:30-9:00 PM may result in overtiredness, which paradoxically makes it harder to fall asleep and stay asleep. Cortisol rises when babies are overtired, leading to more night wakings and early mornings. Moving bedtime earlier, even by 15-30 minutes, often improves overnight sleep quality.
Baby Only Napping 30 Minutes
Short naps of 30-45 minutes are extremely common in babies under 6 months. Your baby is waking at the end of a single sleep cycle and has not yet learned to link cycles together during the day. This is developmentally normal and typically improves on its own between 5-7 months as the brain matures.