Another common fear about corticosteroids is that they will cause growth suppression in children. To date, many studies have been done that prove that corticosteroids do not stunt a child's growth. Six years of ongoing studies in children and adolescents who used inhaled corticosteroids show that the speed of growth may be slowed by about 1 cm. over one year in children. However, these children catch up and do attain their full adult height. In some studies, these children grew even taller than their siblings. Interestingly, poorly controlled asthma can actually contribute to growth suppression.
What researchers have found is that individual hair follicles have different expression of genes within the follicle. Each gene expression reacts differently to androgen. Some genes inhibit follicle health and some increase follicle health. Since each follicle is independent of one another, each gene expression is also independent of one another. This is why hair transplants work. The follicles on your head might be dying, but the ones in other areas of your body are not, so doctors can simply move them. The transplanted hair follicle will not die because the genes associated with that follicle are not negatively affected by androgen, no matter what area of the body they’re in. Nothing like back hair on your head! The process that allows a specific gene to be expressed in a certain follicle isn’t yet understood. What is known is that the programming occurs in the pattern processing during development.