08/06/2026
It's one of the most common questions parents ask: "When will my baby sleep through the night?"
The answer may not be what you expect. While some babies begin sleeping longer stretches by 4–6 months, many healthy infants continue to wake during the night well into their first year.
Part of the confusion comes from the phrase "sleeping through the night." In pediatrics, this often means sleeping 6–8 hours at a time, not necessarily from bedtime until morning.
Sleep patterns are influenced by age, feeding needs, growth spurts, illness, teething, developmental milestones, and temperament.
By around:
- 2 months: many babies sleep 3–5 hour stretches
- 4 months: some babies sleep 4–6 hour stretches
- 6 months: many babies can sleep 6–8 hours
- 9–12 months: some babies sleep 10–12 hours, while others still wake occasionally
Remember, night waking does not mean you're doing anything wrong. Infant sleep is developmental, and there is a wide range of normal.
How old was your baby when they started sleeping longer stretches?
Share your experience in the comments. Sometimes it helps new parents to see just how different every baby's sleep journey can be.