Is your 4-month-old suddenly not sleeping as well? Here's how long sleep regressions last and why they happen.

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.

The 4-month sleep regression is when a baby experiences sleeping difficulty at 4-months-old. Research into this is limited, and not all babies will experience it.

Sleep is precious (and sometimes hard to come by) in the first year of your baby's life. Here's how to make it through the 6-month sleep regression.

From 4 months to about 1 year of age, they'll sleep 9 to 12 hours at night, with a couple added naps during the day. But remember, most babies will sleep only about 5 to 6 hours at a time to start.

Your baby may now sleep as long as 4 to 6 hours, usually during the night. 4-12 months old: 14-15 hours per day. Not only is your baby much more social at this age, ...

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

Babies as young as 2 months old can be taught to sleep through the night by being left to cry, says a large and prominent pediatrics practice in New York and Los Angeles.