My son will be 17 in 2 months. His GP just ran a blood panel which showed his testosterone level was low. (I think it was 140) He is growing. He is 6 feet tall. (His father and family are all 6' 3" and taller) But, he is not developing... he has little to no body hair, she says he still hasn't hit his growth spurt, no voice change yet, etc...

What are the causes of low testosterone in a teen boy. What should we do? Where can we get additional info. Can the time of day of the test or what you eat have any bearing on the results. Also, he does have asthma and he had just had a breathing treatment...could that make a difference?

His dr. is going to repeat the blood test in another month.

Any info would be appreciated!

Research Klinefelters Mosaic Syndrome, 47xy/xxy.
Then ask the doctor about it, he may have heard of it since it occurs 1 in every 500 male births but is kept secret.

Ask the doctor to test for your sons estrogen E2. It may aso be high. Is he starting to grow breasts?

Testosterone is the highest in the morning.

Hcg injections will try to get the testicles to produce more testosterone.

Testosterone supplements will cause the testicles to shut down production of testosterone & sperm. He probably has few active sperm now.



Good luck

The combination of asthma and low testosterone indicates he probably had some sleep problems and should be checked for sleep apnea as well as nocturnal asthma. This would have caused a lack of Luteinizing Hormone spurt at puberty and the consequent lack of testosterone surge.
Testosterone is generally tested at 8:00am and rates should be adjusted for age and ethnic heritage.