Baby sleep time

A full sleep cycle takes about 90 to 110 minutes. Your first REM period is short. As the night go...

Improve your sleep with Sleep Cycle, an intelligent alarm clock and tracker that analyzes pattern...

Stage 1, NREM, N1 ; Stage 2, NREM, N2 ; Stage 3, NREM, N3, Slow-Wave Sleep (SWS), Delta Sleep, De...

The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It...

There are four sleep cycle stages in total, including light sleep, deep sleep, and rapid eye move...