In total 4-month-old babies need 14.5 hours sleep over 24 hours. Naps should total around 4 to 5 hours a day. Wake windows ...

The dreaded 4-month sleep regression is the time when your baby’s sleep patterns shift and they wake up often during the night and refuse to go back to sleep.

"A 4-month-old baby should be given the opportunity to nap every 1.5 to 2 hours," says Dr. Charissa Chamorro, a private practice sleep consultant and clinical psychologist.

New babies are famously inconsistent sleepers, waking up often — day and night — to eat. They might struggle to nap during ...