Normal height standard for 9 weeks old girl is about 134cm.
The formula for calculating the normal height standard for a 9-year-old girl is: age (years) x 6 + 80, so the normal height standard for a 9-year-old girl is about 134cm.
Because the growth of children’s height is not an equal increase, so the evaluation of children’s height, you need to judge according to their own growth, after the age of 2 years old, if the annual growth in height is greater than 5cm, consider the growth rate is normal.
At the age of 9, children gradually begin to enter puberty, you need to ensure that your child has a rich and balanced nutrition, adequate sleep, and take your child to participate in outdoor sports, which will help promote the growth of height.
If the annual height growth is less than 5cm, or there are other abnormalities, take your child to the hospital.