The easiest way for families is to use the curves of the health record that can be the way to know about the information about growth hormones. Some doctors sometimes have to use curves of different presentations but they are in principle the same references.Information given by Growing Taller 4 Idiots PDF
The growth curves of American references - They were developed by researchers followed from healthy children from birth to adulthood, either for almost 20 years for some of them. On these curves, we always notice three lines (+ 2 standard deviations, M, -2 standard deviations) and sometimes two additional lines (+ 1 SD, -1 SD) defining multiple zones or "corridors".
A birth: for size, the average is 50 cm at birth, 75 cm at the age of one year and a little over 1 m to 4 years in girls and boys. At puberty: growth then differs in both sexes during puberty. It reaches an average adult height of 175 cm for men and 163 cm for women. All four lanes located around the mean between the lines + 2 standard deviations, -2 standard deviations correspond to about 95% normal population.
To weigh and measure your child regularly thus it is desirable for families to learn to write their own points of size and weight specified by the physician on the growth curve of health records of their child. These items should be reported as precisely as possible the exact age of the child in years and months. This will allow families to identify themselves practically a disorder of growth.