Newborn babies have an undeveloped sense of day and night. However, after about two months of age, they begin to develop a rhythm of day and night. Sleeping training is necessary for babies to grasp the rhythm of day and night. When they wake up in the morning, they are exposed to the morning sun. At night, turn off the lights and keep the room quiet. If you are conscious of these things and establish a rhythm, your baby will be able to sleep on his/her own.
