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The Cocoo Blog

Real talk on baby sleep.

Step-by-step guides and real talk from a first-time mom — the sleep science behind what actually works.

Sleep Science · Root Cause Guide

Why Are Baby Naps So Short? The 4 Root Causes (and How to Fix Each)

Short naps ending at 30–45 minutes almost always come down to one of four diagnosable causes: a wake window that's off, a sleep association, overtiredness, or an environmental trigger. Here's how to tell them apart — and which fix is yours.

September 2026·8 min read
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Sleep Science · Root Cause Guide

Baby Waking at 4am? Here's the Root Cause — and How to Fix It

Between 4–6am, babies enter their lightest sleep phase. Any unmet need becomes impossible to sleep through. This guide covers the 4 root causes of 4am waking and how to diagnose which one is affecting your baby.

September 2026·7 min read
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Sleep Science · Data Study

Baby Fighting Sleep but Tired — Why It Happens & What to Do

When a baby fights sleep despite being exhausted, it almost always means they've passed their sleep window. We analyzed 751 babies to understand how sleep onset time relates to night quality — and what to do about it.

August 2026·8 min read
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Sleep Science · Quick Guide

The 4-Month Sleep Regression — What's Really Happening & What to Do Tonight

Your baby's brain just shifted to adult-like sleep cycles — that's why they're up every hour. Here's what's happening and 5 specific things you can try tonight.

August 2026·6 min read
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Guide · Sleep Habits

How to Stop Holding Baby to Sleep — Step-by-Step Gentle Method

Your baby can learn to fall asleep without being held — and you don't need cry-it-out to get there. A gentle 3-step method: put down drowsy in the right window, pat and shush, then gradually do less.

June 2026·7 min read
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First-Time Mom Series · Part 1

Newborns Don't Just "Fall Asleep" — Here's What No One Tells You

No matter how tired they are, newborns can't self-settle — their nervous system isn't built for it yet. Here's what actually helps, from a mom who learned it the hard way.

March 2026·5 min read
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More posts are coming.

Nursing to sleep, short naps, contact napping, wake windows, the 4-month regression — more guides and posts are on the way.

Try Cocoo while you wait