Growth and development are physiological phenomena that characterize infancy, childhood and adolescence. The pediatrician introduced, commonly used pediatric growth and development indicators are weight, height, head circumference, chest circumference. 1, weight Reflects the most important and sensitive indicators of pediatric growth and development, can reflect the child’s nutritional status. Weight in the first three months of life the fastest growth, generally 600 to 1000 grams of monthly growth, the best not less than 600 grams. 3 to 6 months of general monthly growth of 600 to 800 grams. 6 to 12 months of average monthly growth of 300 grams. 1 year old after the growth rate of the child slowed down significantly, 1 to 3 years of age, the average monthly growth of the weight of the child 150 g. 2, length of short-term impact on growth and development, the most important and most sensitive indicator of the child’s nutritional status. 2, length Short-term factors affecting growth and development (nutrition, disease, etc.) on the length of the influence is not obvious, mainly by genetic, racial and environmental influence is more obvious. Length grows fastest in the first year of life, with an average annual growth rate of 25cm, an average growth rate of 10cm in the second year, and an average growth rate of 4-7.5cm in the third year. 3, head circumference Head circumference is an important indicator of a child’s brain development. Head circumference is an important indicator of a child’s brain development. 34cm on average at birth; 46cm on average at the age of 1 year; 2cm in the second year and 1-2cm in the third year. 48cm on average at the age of 3 years, which is more or less the same as that of an adult. 4, chest circumference When the child was born, the chest circumference is smaller than the head circumference, with the growth of the age of the month, the chest circumference gradually catch up with the head circumference. Generally, when the child is 1 year old, the chest circumference is equal to the head circumference. However, due to the generally good nutritional status, many infants before the age of 1 year chest circumference to catch up with the head circumference. After 1 year of age, the chest circumference grows significantly faster than the head circumference, and the chest circumference gradually exceeds the head circumference.