Slept Blog

Baby sleep, explained without the noise.

Research-backed guides on regressions, wake windows, and sleep training — written for your baby's exact age and stage.

A tired mother gently rocking her 4-month-old baby in a dark bedroom at night

7 min read

The 4-Month Sleep Regression: A Survival Guide for Exhausted Parents

It's not a phase that ends — it's a permanent shift in how your baby sleeps. Here's what's actually happening and what to do about it.

An 8-month-old baby pulling up to stand at the edge of a dark nursery crib at night

6 min read

8-Month Sleep Regression: Why It Happens and How Long It Really Lasts

Crawling, standing, separation anxiety, teething — the 8-month regression has more going on than any other stage. Here's how to tell what's driving it.

A calm, alert baby in soft daylight near a window with a parent's hand nearby

6 min read

Wake Windows by Age: The Chart That Actually Explains Your Baby's Naps

Wake windows matter more than clock time. Here's the month-by-month chart, and how to use it to actually fix short naps.

An exhausted parent checking a glowing smartphone at 3am beside a sleeping baby

8 min read

Why Won't My Baby Sleep Through the Night? The 7 Most Common Causes

Frequent night waking almost always traces back to one of seven causes. Here's how to figure out which one is yours.

Two parents sitting together on a couch at night looking at a tablet

9 min read

Sleep Training Methods Compared: Ferber, Chair, Pick-Up-Put-Down, and More

Every method promises results. Here's an honest comparison of how they actually work, and how to pick the right one for your family.

A toddler standing in a cot at night reaching toward a parent in the doorway

6 min read

The 18-Month Sleep Regression: Surviving the Toddler Sleep Strike

Independence, big feelings, and a language explosion all peak around 18 months — and sleep takes the hit. Here's what's going on.

A newborn baby swaddled and sleeping peacefully in a bassinet at night

7 min read

Newborn Sleep Schedule: What's Actually Normal in the First 3 Months

There's no real schedule in the first 12 weeks — here's what's actually happening, and what's worth doing about it.

Two parents each holding one of their twin babies in a dark nursery at night

7 min read

Sleep Training Twins: How to Do It Without Losing Your Mind

Same methods, double the logistics. Here's how to actually sleep train twins without one waking the other every time.