Baby sleep refers to the patterns and cycles of rest that infants experience. Newborns typically sleep 14 to 17 hours a day, but this sleep is often broken into short periods. Their sleep cycles are different from adults, with more time spent in REM sleep, which is essential for brain development. Establishing a consistent sleep routine can help babies learn when it's time to sleep. Techniques such as swaddling, using a pacifier, and creating a calm sleep environment can promote better sleep. Understanding a baby's sleep cues, like yawning or fussiness, can also aid parents in responding to their child's needs effectively.