1. Avoid children taking contraceptive pills by mistake. The hormones contained in birth control pills can lead to premature sexual maturity in young children, so young parents who take birth control pills should put them out of reach of their children. 2, avoid the use of cosmetics and skin care products for children. Cosmetic skin care products, especially adult skin care products, contain a certain amount of hormones to make the local skin soft and shiny, but can penetrate into the body through the skin and promote the development of sexual characteristics. If you choose cosmetics for children, be sure to pay attention to the ingredient labels to ensure that they do not contain hormones. 3, avoid children taking “royal jelly”, “ginseng” and other nutritional supplements. These health care products may contain a lot of hormones, or may lead to precocious sexual maturity through the role of the sexual development center of the brain. 4, avoid children taking “snapper”, “eel” and other foods, such as food with high hormone content, and the early start of the sexual development center of the brain has a catalytic effect. 5, avoid children to take “anti-seasonal vegetables” and “anti-seasonal fruits”, as well as meat and poultry containing more hormones. 6, try to avoid ultraviolet radiation. Excessive ultraviolet radiation has a certain promotion effect on sexual development. It is recommended that children should have reasonable protection when they go out in summer. 7, try to avoid premature exposure of children to romantic films or romance novels. Long-term exposure to such works will stimulate the child’s sexual development center, which may lead to the early development of sexual characteristics. 8, in the diet to ensure a balanced diet for children, food diversification can be, it is recommended to eat more green vegetables, fruits and milk, no need to add extra tonic food or nutrients. 9.Control obesity. It is recommended to ensure that obese children have the necessary nutrition for growth and development, but to control the intake of fat and sugar. 10, reasonable exercise. Every day should have about 30 minutes of exercise time, such as rope skipping, basketball, stair climbing, swimming, standing jump and so on can significantly stimulate the secretion of growth hormone, stimulate the growth of bones, help improve the final adult height of children.