and won't go down for naps – this is the 4-month sleep regression. At 4 months old, your baby is ready to take the first of many massive developmental leaps. However, changes in their awareness ...

Babies 3 to 6 months old tend to sleep around 15 hours per day — about 9-10 hours at night, and the other four to five hours during naps. "A 4-month-old baby should be given the opportunity to ...