The height of girls keeps increasing from two to fourteen years old, and it is basically stable after fourteen years old, especially in primary school, which can grow nearly ten centimeters a year, so girls are usually taller than boys. Some girls develop faster, and their breasts begin to develop in the third grade, so girls who develop faster also grow faster. Their height curves are rising from two to twelve years old, with a big gap, and they don't develop until they are fourteen years old.
There is an app called growth record, which records the growth curve. It contains a 24-hour secretion schedule of growth hormone. You can also record the child's height, weight, head circumference and so on. It is convenient to observe the child's growth record and know whether the child's growth is normal. You can also take these growth records as precious memories of your children when they grow up. These are free to use. Just buy BM 1, but this is of little use.
If you don't know the height law of girls, you can check the height curve of girls online, so you can see it more clearly. If you want to record your child's growth, you can use the app recommended above.