Growth spurts can happen at any time in the life of a girl or a boy, but they usually end within a period of two years. Boys tend to get a growth spurt at age 11 which lasts until they turn 13 while girls tend to have theirs at 10 which lasts until they turn 12.
An average woman is almost 5 inches shorter than an average man. The reason for this is that during a growth spurt a girl only grows about 3 inches a year while a boy grows almost 4 inches.
As the teenagers approach puberty, their growth usually stops. Boys tend to reach puberty by the time they turn 17 while girls do the same when they are around 15 to 17 years old.