Question: Hello, I know you must get sick of people asking these questions, but I would love it if you could simply answer my questions. Is it possible that I have delayed puberty or a growth hormone deficiency? I have experienced high levels of fatigue for most of my teenage years. I have just turned 19 and am 5 feet 8.5 inches tall. My mum is the same height as me (but was 5'10 before she shrunk with age) and my dad is just over six feet tall. The majority of my family members are also tall. I began puberty around the age of 11, but I do not feel that I have fully developed. I feel like I "fell behind" other kids. I did not even begin to grow armpit hair till the age of 17, and it only now is visible to the naked eye. I also have very little body hair and no facial hair at all. While I do have a strong understanding of genetics as I am a Medical Science student, I feel strongly that I have not developed properly and I feel my frequent fatigue throughout my teenage years is pathological. I have had blood tests before and there have only ever been slight abnormalities that have usually corrected themselves in time; however I feel that potentially more diagnostic work may be merited in my case given that I appear undeveloped and am also shorter than both my parents final heights. Please note that I also sleep for 8 hours at least consistently; although when I was a younger teenager I often did not get the amount of sleep I needed. I understand these questions are annoying for an endocrinologist but my consistent fatigue combined with my short stature, thin build and lack of body or facial hair has garnered me significant negative attention throughout my life and caused me great psychological stress. Thank you for your time.