Regressions & transitions
The predictable rough patches: developmental regressions and nap transitions, age by age.
Sleep regressions, age by age
The 4-month, 8-month, 18-month and 2-year regressions, and when it's more than a phase.
The 4-month sleep regression
The big one: why sleep changes for good around this age, and what actually helps.
The 8 to 10 month regression
Crawling, standing and separation anxiety all land at once. Here's the usual shape of it.
The 12-month, 18-month and 2-year regressions
Toddler regressions look different: independence, big feelings, and bedtime negotiation.
Dropping from two naps to one
Most children make this move between 14 and 18 months. How to time it and smooth the gap.
Dropping the last nap entirely
When the day nap ends (usually between three and four), and what quiet time replaces it with.
The 6-month sleep regression
What's behind the 6-month wobble, and how it differs from the 4-month change.
Starting solids and sleep
Whether solids help sleep, what the evidence says, and how the change can unsettle nights.
Crawling, walking and sleep
Why new movement milestones disrupt sleep, and how to ride out the practice phase.
Growth spurts and sleep
How growth spurts show up at night, how long they last, and telling them from a real problem.
Preschool sleep changes (3+)
Dropping the nap, new fears, and bedtime negotiation as your child heads toward school.