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Why Won't My Newborn Sleep?

If your newborn will not sleep, you are not doing anything wrong. Newborn sleep is broken up by design, and there are real, common reasons behind the hardest nights.

By Regulated Parents Guide Team

The Regulated Parents Guide team writes psychology informed guidance drawn from attachment theory, polyvagal theory, and nervous system regulation research. About the team.

Published Last updated

Their sleep biology is not built yet

Newborns do not have a set day and night rhythm. Melatonin production is low for the first 8 to 12 weeks, so their body cannot tell time yet.

Short sleep cycles of 45 to 50 minutes mean they surface into light sleep often. This keeps them safe, and it is protective, not broken.

They are almost always hungry or working on digestion

A newborn stomach is small, so most babies need to feed every 2 to 3 hours around the clock. Cluster feeding in the evening is common and expected.

Gas, reflux, and needing to burp all pull babies out of sleep. If discomfort seems constant, ask your pediatrician to check.

They are staying awake too long

Newborn wake windows are only 45 to 60 minutes. Past that, cortisol rises and it becomes harder, not easier, to fall asleep.

Watching for early tired cues like a still stare, red eyebrows, or a first yawn helps you catch the window before they are overtired.

They need you close to regulate

Newborns cannot self soothe. Their nervous system regulates through yours, which is called co-regulation.

Contact naps, babywearing, and being held are not bad habits. They are how newborns feel safe enough to sleep.

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By Regulated Parents Guide Team

The Regulated Parents Guide team writes psychology informed guidance drawn from attachment theory, polyvagal theory, and nervous system regulation research. About the team.

Published Last updated