Sleep: 2-3 Months

Around 10-12 weeks, infants start to develop a circadian rhythm. They sleep less during the day and more at night. Infants are now physiologically responsive to light for waking times and dark for sleeping time.

Infants start to enter sleep during the Quiet stage rather than the Active stage, making it easier for them to fall into a deeper sleep right away. Since they enter sleep in the Quiet stage rather than the Active stage, infants are also less likely to wake up when first laid down.

Parents can watch for cues of sleepiness and start a short, simple routine for helping their baby fall asleep. Simple sleep rituals, like singing, rocking, or lowering the lights, help babies anticipate what’s next and learn to fall asleep more easily.

Evening fussiness starts to improve, and the infant’s stress regulation system is maturing.