I have some information about Testosterone measurement. I am 75, and Endocrinologists at Baylor College of Medicine, Houston, Texas, set-up a trial for Testosterone measurement for elderly guys like me. I was asked to give a small amount of blood so my Testosterone level could be measured. I was later told that I did not qualify for the trial because my Testosterone level was too high for the trial. For comparison, my Testosterone measures 590 ng/dL(nanograms per deciliters). Trial members will have a Testosterone cream to rub into their skin once a day for 30 days. I do not think any good things in life comes to us instantly. You should notice over time that your beard and hair will grow faster(about three-quarters of an inch a month). Your sexual tension(hornyness)will improve and your speech should become stronger as well as your physical strength. I do not know whether you will maintain a certain level of Testosterone in your blood, or whether you must take Testosterone injections,skin patches, or rub-on gel to keep your Testosterone level on a daily or weekly basis. Anyway, there is good news for you as your body image will soon change for the better.
I would not worry to much, I had plenty of hair around penis and testicles by 15
arm pit hair came around 17, 18.
I got a little bit of chest hair ( mostly around my nips ) in my early 20's.
Try not to worry to much.
It is important that you work with your pediatric endo, who would assess your present stage of pubertal development and the cause for late puberty. The treatment will depend up on the exact cause for the delay in puberty. If testosterone is presribed, it will be only for a short while to kick start the puberty, so that your body's natural development is brought in to initiate pubertal changes. The process will take some time to go through it and it will not be instantaneous.