Parenting Life Guide

Published: September 3, 2026

Infant Sleep: When Does Sleeping Through the Night Begin

A baby’s sleep pattern gradually settles as they grow. Based on CDC and AAP resources, here’s what’s helpful to know about newborn and infant sleep.

Sleep Duration and Longer Stretches

Newborns tend to sleep around 14-17 hours a day, waking and sleeping in short stretches without much day-night distinction. Around 3 months, the gap between nighttime feeds tends to lengthen, and by around 6 months, more babies start sleeping 5-6 hours or longer at a stretch. Timing varies quite a bit from baby to baby, though.

Helping Baby Tell Day From Night

During the day, opening curtains for natural light and not deliberately muffling household sounds can help. At night, keeping the room dim and quiet supports your baby in learning the difference between day and night.

Safe Sleep Setup

Placing your baby on their back for every sleep time is considered to help lower the risk of SIDS (Sudden Infant Death Syndrome). Using a firm mattress and keeping pillows, blankets, cushions, and stuffed toys out of the sleep space is recommended.

Reading Nap Cues

Watching your baby’s cues can be more helpful than following a strict schedule. Eye rubbing, yawning, looking away, or sudden fussiness are considered common signs that it’s time for sleep.

Sleep Tips for This Stage

Repeating a quiet routine before bedtime, like a bath followed by reading, in a similar order each day, may help your baby anticipate sleep time.

When to Consider Talking with a Pediatrician

If your baby still shows little difference between day and night sleep past 6 months, has notably irregular breathing sounds or ongoing snoring during sleep, or seems unusually lethargic and hard to wake during the day, checking in with a pediatric provider may be helpful. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.