Sleeping late has an effect on children’s growth and development, resistance and memory. 1. Growth and development: During deep sleep, the pituitary gland secretes growth hormone, which helps children grow taller. If you sleep too late and for too short a time, it will cause a lack of growth hormone and affect the development of your child’s height. 2. Resistance: Adequate sleep helps strengthen the child’s resistance. If the child is overworked and sleeps too little, it will affect the child’s resistance and is prone to various infections. 3. Impact on memory: less sleep at night will cause no energy during the day, especially for school-age children. Symptoms such as lack of concentration and drowsiness in class will affect the child’s memory and academic performance. Parents should supervise their children’s sleep on time and create a better sleep environment for them. Ensuring adequate sleep and sleep quality will help growth and development.