Medical Conditions - Testosterone Level

The average testosterone level is between 300 to 1000 ng/dL; anything below 300 ng/dL is considered a low testosterone level. A decrease in testosterone level is likely to affect the appearance and sexual drive of a male. Reduced libido, less semen, erectile dysfunction, fatigue, loss of hair and muscle mass, decreased memory and bone mass, reduction in the size of testicles, etc., are the signs of low testosterone level.