There are two stages of rapid growth in girls, with the fastest growth in the first year of life, and two growth spurts in infancy and puberty.
The average length of a newborn baby at birth is 50cm. the average growth in length in the first year of life is about 25cm, of which the first three months of growth of 11-13cm, about equal to the growth of the last nine months, so the length of one year old is about 75cm.
At the age of 10 to 12 years, the second rapid growth period, when the height of girls grows very fast, and the vast majority of Chinese girls height growth rate of the peak are located in this age, the average annual growth of 8 to 9 cm. Therefore, girls between the ages of 10 and 12 should pay attention to supplemental calcium, vitamin D, as well as more outdoor exercise, conducive to bone growth.
The above is the average statistics of height growth of girls in China, and there will be individual differences in the specific period of rapid height growth. Girls in the growth period can go to the hospital for orthopedic examination to clarify the stage of height development.