Nine to twenty hours a day, in chunks, with no day-night pattern, and more than half of it noisy. The newborn ranges, why schedules cannot work yet, and the two things that actually help.
Every baby wakes at night — even the ones whose parents say they sleep through. What changes with age is whether they call for you. Here is what the overnight video studies actually show.
Not a chart of averages — the real ranges at each age, what is changing in your baby’s sleep, what to expect from naps and nights, and how to use wake windows without being ruled by them.
No peer-reviewed study defines, tests or measures a “sleep regression” at four months — or at any age. What is real is a remarkable reorganisation of sleep between two and five months. Here is what it looks like from the inside.