Best time for children to sleep

The total amount of sleep a child gets is important. Preschoolers need 11-12 hours of sleep a day, and school-age children need at least 10 hours. Most children need to get up at 7:00 to get ready for school, so they should go to bed between 8:00 and 8:30 p.m. Baby to childhood is the key period for the formation of the child's brain. The child's brain needs to grow in sleep. After the child is asleep, the brain blood flow increases obviously. Proper sleep is an important guarantee for the growth and development of the child's brain. Moreover, the child's growth cannot be separated from ghrelin. only when the child is asleep, the pituitary gland secretes ghrelin. The growth hormone secretion is the most vigorous in two time periods, from 21:00 p.m. to 1:00 a.m. and 5:00 a.m. 00-7：00, missing two periods is equivalent to missing the golden age of the child's growth, so the child should go to bed at 8:00-8:30 pm.