first i'll start by correcting this gross misinformation:
NORMAL GROWTH
Let's discuss the process of normal growth before we talk about its variations and abnormalities. While we all start out about the same size at birth, some of us end up tall and some end up short. Most of us wind up with about the same build as our parents - the characteristics a child inherits will reflect those of the parents.
A baby is about 20 inches long at birth (give or take an inch) and will grow another 10 inches over the first year to reach about 30 inches by 1 year of age. During the second year of life, growth is half this fast, so at 2 years of age, the child will be about 35 inches tall. From 2 years until about 12 years of age, the child will grow at a steady rate of 2 to 2-1/2 inches a year. The growth spurt that goes along with adolescence begins at about age 11 in girls and 13 in boys. This pubertal growth spurt usually lasts 2 years and is accompanied by sexual development.
Growth ceases between 16 and 18 years of age, when the growing ends of the bones fuse. A person's adult height is determined by many factors, including the heights of his or her parents, the age at which puberty begins and the length and vigor of the pubertal growth spurt. An x-ray of the hand or knee allows the doctor to assess the maturity of the bones (bone age) and estimate how much growth potential remains.
here's a link to the entire article/biblio.:
http://www.hgfound.org/patterns.html
however, it is completely true that taking steroids before this time can pre-maturely seal the growth plates...i don't think i have to post anything to back that up...
sooooooo, unfortunately, i started my first cycle at 17, so i might have been 6'3" or 6'4"

, but at age 19 or 20, this is simply not an issue...
alpha