Diagnosis

Early detection in boys can help prevent problems from delayed puberty. Early diagnosis and treatment in men offer better protection against osteoporosis and other related conditions.

Your health care provider will conduct a physical exam and note whether your sexual development, such as your pubic hair, muscle mass and size of your testes, is consistent with your age.

Your provider will test your blood level of testosterone if you have signs or symptoms of hypogonadism. Because testosterone levels vary and are generally highest in the morning, blood testing is usually done early in the day, before 10 a.m., possibly on more than one day.

If tests confirm that you have low testosterone, further testing can determine if a testicular disorder or a pituitary abnormality is the cause. These studies might include:

• Hormone testing
• Semen analysis
• Pituitary imaging
• Genetic studies
• Testicular biopsy