Sleep Regressions
Understand what sleep regressions really are, when they happen, and how to handle them gently.
Sleep regressions are some of the most disorienting moments in a baby's first two years. A baby who was sleeping well suddenly starts waking multiple times a night, fighting naps, or taking much longer to settle — and nothing seems to help. The most common question parents ask is: is this a sleep regression, or have I done something wrong?
When sleep regressions typically happen:
- 4 months — permanent change in sleep architecture
- 8–10 months — separation anxiety and developmental leap
- 12 months — often coincides with the nap transition
- 18 months — one of the most intense regressions
- 2 years — driven by big developmental changes
The answer is almost always neither. Sleep regressions are driven by neurological development — your baby's brain is going through rapid changes that temporarily disrupt sleep. They are a sign of healthy development, not a sign that your baby's sleep is broken. But that does not mean you have to just wait them out. Understanding which regression you are dealing with makes it significantly easier to manage.
Angelica Videla is a certified baby and toddler sleep consultant based in London, supporting families across the UK, Europe, US, and Australia. The articles below cover each regression in detail — what is happening developmentally, how long it lasts, and what you can do to get through it gently.
4-Month Sleep Regression: How Long It Lasts & How to Survive It
The 4-month regression is a permanent change in sleep architecture — not a phase that passes. Here is what is actually happening and how to resolve it gently.
Read article →8-10 Month Sleep Regression — What to Expect and How to Handle It
The 8-10 month regression hits during a big developmental leap. Here is what is happening and how to get through it gently.
Read article →12 Month Sleep Regression — Signs, Causes and What Helps
The 12 month regression often coincides with the nap transition. Here is how to tell what is going on and what to do.
Read article →18 Month Sleep Regression — Why It Happens and How Long It Lasts
The 18 month regression is one of the most intense. Here is why it happens and how to manage it without making things worse.
Read article →2 Year Sleep Regression — Causes and Gentle Fixes
The 2 year regression is driven by big developmental changes. Here is what is causing it and what actually helps.
Read article →Sleep Regression or Schedule Problem — How to Tell the Difference
Not every sleep disruption is a regression. Here is how to work out what is actually going on.
Read article →If early mornings (or any other sleep issue) have been going on for a while, find out whether sleep consulting is worth it.
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