Was Ferber wrong?
Short answer: At nine months a typical baby takes two naps, sleeps close to 3 hours in the day and around 14 hours in total, which puts the average wake window at roughly 3.5 hours. Individual childre...
The lowdown on sleep cycles and wake windows
Short answer: A sleep cycle is one stretch of non-REM sleep followed by one stretch of REM sleep. In babies it lasts around 30 to 45 minutes, reaching about 60 minutes by the first birthday and 90 min...