Babies spend most of the day in sleep, but some babies always sleep a lot during the day, and once they get to sleep at night, they don’t sleep at all. This makes parents very headache, day and night reversal not only makes parents rest poorly, the next day’s spirit is not good, but also affect the baby’s growth. In addition to genetic, nutritional and exercise factors, baby’s height also has an important relationship with the secretion of growth hormone. Too little secretion of growth hormone is likely to cause short stature. The secretion of growth hormone has a specific rhythm, and the peak of secretion is generally from 22:00 to 1:00 am. If you sleep too late, it is very likely to affect the height of your growing baby. In the face of such a baby, the mother should first of all not be anxious, but find ways to maximize the time the baby is excited during the day and develop a good sleep routine. Here are some of our tips for mothers: 1. Don’t let your baby sleep after 5 or 6 o’clock in the afternoon. When your baby wakes up from his nap, be sure to tease him to play a little longer; 2. During the daytime, the room should be as bright as possible. Keep the sound inside the room all the time, you can play some soft music; 3, give your baby a fixed sleep cue, do the same thing before each sleep, and let your baby sleep in bed afterwards. For example, first give your baby a hot bath, then feed him and change his diaper.