How many inches does a growth spurt gives? and at which age does it takes place?
i am 16years old male and 172 cms in height.i had grown some 4 inch in two months 3 years ago.is that a growth spurt??or i had not undergone.a spurt??i heard it gives an increase of 7 to9 inches.when will i have a growth spurt??pls help me..