1, boy: (father height+mother height+13) ÷ 2 5cm 2, girl: (father height+mother height-13) ÷ 2 5cm "height" three elements: 1, exercise. 2. Nutrition: Most short children are not malnourished, but the unbalanced diet structure affects the absorption of nutrition. Protein, vitamins and minerals are indispensable substances for children's growth and development. 3. Sleep: Sleep contributes to the secretion of human growth hormone. Studies have shown that sleeping in the first half of the night is the best time to secrete growth hormone. The three stages of growth and development If parents have enough knowledge of the three important stages of children's growth and development and take correct measures, it will undoubtedly be very beneficial to children's growth and development and height. There are five common reasons for children's short stature: 1, heredity. 2. Nutritional imbalance. 3. Endocrine diseases. 4. Mental stress. 5. Environmental pollution. There are three key periods for children to grow taller: the basic stage of growth 1-9 years old is the basic stage for children to grow taller. Science reveals that human bones are in reserve at this stage, and the amount of calcium ions needed for bone development is 300-900 mg per day. Most children of this age are picky eaters, partial eclipse and anorexia, which seriously restricts the absorption of calcium nutrition from food. Insufficient calcium ion reserves in bones, on the one hand, directly lead to short stature of children; On the other hand, it will reduce the sudden increase in height during the child's development. The sudden increase in height 10- 16 years old is the child's development period. The height is obviously longer, and the demand for calcium ions is particularly high at this time. Experts found that at present, every 30,000 mg of calcium absorbed by children can increase their height 1 cm, while the calcium content on the daily table of ordinary families is less than 50% of the amount needed by teenagers. Different families have different intake of calcium ion nutrition. In this way, the height of the child quietly opened the gap. The last sprint stage of growth, male 17-25 years old, female 16-23 years old. It is found that the epiphyseal cartilage of teenagers has not really healed at this stage, and there is still 2-3 cm growth potential every year, so it is still very important to supplement adequate calcium nutrition. It's really a waste to give up trying too early. Measuring children's bone age to predict adult height 1, what is bone age? Children's growth and development can be expressed by two "ages", namely, life age (calendar age) and biological age (bone age). Bone age is the abbreviation of bone age, which is determined by the specific image of bone in X-ray photography. In order to know the child's bone age, it is usually necessary to take an X-ray of the child's left wrist. The doctor observed the development of the ossification center of the phalanx, wrist and lower radioulna of the left palm through X-rays to determine the bone age of the child. 2. What is the significance of measuring bone age? The changes of human skeleton development are basically similar, and the development process of each skeleton has continuity and stages. Different stages of bones have different morphological characteristics, so bone age assessment can accurately reflect the growth and maturity of individuals. Not only can the biological age of children be determined, but also the growth potential and sexual maturity trend of children can be understood as soon as possible through the bone age. It can also predict the adult height of children, and the determination of bone age is also very helpful for the diagnosis of some pediatric endocrine diseases. 3. What are the methods for measuring bone age? There are several methods to determine bone age, such as simple counting method, atlas method, scoring method and computer bone age scoring system. The most commonly used methods are G-P atlas and TW2 (TW3) score. There are three methods to predict adult height: B-P method, RWT method and TW2 method. The newly launched software system for evaluating the bone age of children and adolescents in China adopts an authoritative, scientific and advanced evaluation method recognized by international academic circles-the improved TW2 bone age scoring method, which minimizes the deviation of experience scoring and improves the objectivity and accuracy of reading films. Scientific and mature, can accurately evaluate bone age and predict adult height. It is suitable for judging adolescents' physical development, physiological and sexual development, adult height and menarche prediction. 4. What are the diseases with abnormal bone age? The difference between biological age (bone age) and life age is within 1 year, which is called normal development. The difference between biological age (bone age) and life age >; 1 year is called early development (abbreviated as precocity). The difference between biological age (bone age) and life age < 1 year is called late maturity. Abnormal bone age is often an aspect of some endocrine diseases in pediatrics. Many diseases will affect bone development, or make it advance or lag behind, such as adrenal hyperplasia or tumor, Alber syndrome, precocious puberty, hyperthyroidism, ovarian granulosa cell tumor and so on. , which will lead to early bone age; However, ovarian hypoplasia (Turner syndrome), achondroplasia, pituitary dwarfism, hypothyroidism and so on will all lead to obvious lag of bone age. 5. Why can bone age predict adult height? There is a close correlation between bone age and children's height, and the height of each age stage is highly correlated with adults. So according to the present bone age, we can predict how tall it may be. When forecasting, you need to input the current height and bone age, and girls also need to input whether they have menstruated. Then use different forecasting formulas to calculate the adult height. Among several methods for predicting height with bone age, TW2 method is more accurate after comparison. It must be noted that because there are many factors affecting height, it is impossible to take all factors into account in the prediction formula no matter which method is used for prediction. Moreover, after each prediction, many factors such as nutrition, disease and environment of the predicted object cannot be predicted. Although these prediction methods have certain scientific basis, the error of height prediction is always inevitable. However, the trend reflected by the forecast results cannot be wrong. 6. What are the reasons why children are short? First, the child is short, with the same bone age and life span, which is considered as normal development; Second, the child's bone age is less than the living age, indicating that the child's growth and development is abnormal, and the reasons for this abnormality are various. After determining the cause, you can prescribe the right medicine. The main manifestations are short stature, such as primary dwarfism, familial dwarfism, intrauterine growth retardation and adolescent physical growth retardation. It is difficult to distinguish clinically. Determining bone age, predicting adult height and combining with medical history are helpful for diagnosis. Primary dwarfism and familial dwarfism have normal bone age, and the predicted adult height is low, but the predicted adult height of familial dwarfism children is within the genetic height range; Intrauterine growth retardation, low bone age and short adult height. Combined with medical history, it can be diagnosed in early childhood. The skeletal age of constitutional adolescents with growth retardation is backward, and the skeletal age is basically the same as the height age. The predicted value of adult height is not low. 7. What are the ways for children to grow taller? To improve children's science, we should start with reasonable nutrition, moderate exercise and adequate sleep, eat more vegetables, milk, steak and other foods to ensure adequate nutrition, and participate in skipping rope, swimming, playing basketball, jogging, running stairs and other sports to ensure adequate sleep. Except for short stature that really needs treatment, children of normal height do not advocate taking drugs during their development. If they really think that their children need to grow taller, they should go to a regular hospital for pediatric consultation in time, and the doctor will judge whether it is necessary to carry out human intervention, that is, growth hormone therapy. Don't blindly believe in all kinds of heightening drugs and instruments, so as not to delay the best time for children's growth and development. ..... the mystery of baby's height growth