Baby Sleep Regressions

The 4-month sleep regression is the most significant — and permanent — change in your baby's sleep. Unlike other regressions, this isn't a phase you "get through." Your baby's sleep cycles are permanently maturing from newborn sleep patterns to adult-like cycles. The good news? Understanding what's happening makes it much easier to navigate.

The 6-month sleep regression often catches parents off guard because things may have just started improving after the 4-month chaos. This regression is driven by major developmental leaps — sitting up, babbling, and starting solids — all of which excite your baby's brain and temporarily disrupt sleep.

The 8-10 month regression is a perfect storm: your baby is learning to crawl, pull up, and cruise — while simultaneously developing separation anxiety. They now understand that you exist even when they can't see you, which makes being alone in a dark room much more distressing.

Happy birthday — and welcome to the 12-month "nap strike." Your newly minted toddler may suddenly refuse their second nap, leading many parents to drop to 1 nap way too early. DON'T. This is the #1 mistake at this age. The nap strike is temporary; dropping a nap too early causes weeks of overtiredness.

The 18-month regression is uniquely challenging because your toddler now has OPINIONS. They can say "no," run away, and stage elaborate bedtime protests. This regression combines the 2-to-1 nap transition with a massive independence drive and emerging language skills.

Just when you thought you were done with sleep regressions... the 2-year regression arrives. This one is driven by imagination development (hello, monsters under the bed), potty training, and the potential transition to a toddler bed. It's also the age when night terrors may first appear.