Waking up
Waking up

What are the sleep regression ages, and which are actually rough?

M Asked by Meg

Keep seeing people mention 'regressions' at different ages and I can never tell if it's a genuine developmental thing or just a rough few nights. What are the usual ones and which floored you the most?

7–12m Cot
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Discussion · 1
N Nat just now
The ones you hear about are roughly 4 months, 8 to 10 months, a year, 18 months and 2 years. For us the 4 month one, which isn't really a phase, it's their sleep changing for good, and 18 months were the killers. The rest we barely noticed. They tend to land right when a big new skill is brewing, crawling, walking, talking, that sort of thing.
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