Physiological constants are summaries of the growth and development patterns of a healthy pediatric population and are used to measure the health of the pediatric population. The determination of pediatric nutrition and health is an important part of the identification and treatment of food. From the length and weight to measure pediatric nutrition and health Pediatric fat is not necessarily a sign of health, some parents regardless of pediatric gastrointestinal tolerance, do everything possible to give the child to eat nutritional supplements to cultivate into a fat person, this is foolish, unscientific performance. Overweight will bring a lot of burden to the child, leading to the occurrence of disease, then how the weight and height for the standard? According to China’s statistics pediatric standard weight to measure the child fat and thin, the general standard weight of newborns when the average is about 3 kg, its fluctuation range is not more than 10%. Six months after birth average monthly growth of 600 grams; 6 months to 1 year old average monthly growth of 500 grams; 1 year old after the annual growth of 2 kilograms. The following formula can be used to project: 1 to 6 months: weight (grams) = 3000 + age of the month × 600 7 to 12 months: weight (grams) = 3000 + age of the month × 500 1 year old and above: weight (kilograms) = 8 + age × 2 Parents mastered the standard of weight, you can always observe and judge their own children’s weight gain or loss, so that the child’s growth will not be overfat or too thin. In addition to weight, but also to see whether the height of the child is excessive, the child is too short will become a dwarf, too high easy to become giants, these are not healthy standards, the general standard length of the newborn child 47 ~ 50 cm. 1 year old children within the length of the growth rate is faster, the average length of about 2 cm a month; 2 years old after the length of the body can be used in the following formula to deduce: length = the number of weeks of age × 5 + 75. For example, a seven-year-old For example, for a 7-year-old child, length = 7 x 5 + 75 = 110 centimeters. When measuring height, it is also important to look at whether the child is well proportioned. The medical term for “upper body” is “upper measurement”, which is from the top of the head to the upper edge of the pubic symphysis. The “lower volume”, that is, from the upper edge of the pubic symphysis to the soles of the feet, at the age of 12 years old, the upper and lower volumes are equal, which before the lower volume is shorter than the upper volume. After puberty, the lower measure is longer than the upper measure. Indicates that the growth of pediatric body length, mainly the growth of long bones. Taller people have longer lower limbs, and shorter people have relatively shorter lower measurements. Therefore, length and weight are both criteria for determining a child’s nutritional health.