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2. What Free Testosterone Is, and Why it Matters - AOL

   www.aol.com/free-testosterone-why-matters...

   But when considering calculated free testosterone, luteinizing hormones, and sex hormone-binding globulin levels, up to 20.2 percent of men would qualify as having subsets of the condition, like ...

3. What Is Low Testosterone & What Causes It? - AOL

   www.aol.com/low-testosterone-causes-125700734.html

   LH and FSH test. If you do have low testosterone, your healthcare provider will test your LH and FSH levels to determine if the root of your low T is in the testicles or the brain (i.e. if you ...

4. Is a Testosterone Test Important? - AOL

   www.aol.com/testosterone-test-important...

   What to know about getting your testosterone tested including when to get one, which test to take, what it tells you and more.

5. Free androgen index - Wikipedia

   en.wikipedia.org/wiki/Free_androgen_index

   Free Androgen Index (FAI) is a ratio used to determine abnormal androgen status in humans. The ratio is the total testosterone level divided by the sex hormone binding globulin (SHBG) level, and then multiplying by a constant, usually 100. The concentrations of testosterone and SHBG are normally measured in nanomols per liter. FAI has no unit.

6. Hypogonadism - Wikipedia

   en.wikipedia.org/wiki/Hypogonadism

   In particular, research has questioned the validity of commonly administered assays of free testosterone by radioimmunoassay. [16] The free androgen index, essentially a calculation based on total testosterone and sex hormone-binding globulin levels, has been found to be the worst predictor of free testosterone levels and should not be used. [17]

7. What are normal testosterone levels by age? - AOL

   www.aol.com/news/normal-testosterone-levels-age...

   Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels.

8. Testicular atrophy - Wikipedia

   en.wikipedia.org/wiki/Testicular_atrophy

   Low testosterone is a potential cause of testicular atrophy, and laboratory values of blood samples can confirm low free or bioavailable testosterone. [ 25 ] Due to the high levels of oxidative stress in the semen, there may also be higher levels of sperm DNA fragmentation for people with varicoceles.

9. What You Need to Know Before You Take Testosterone - AOL

   www.aol.com/lifestyle/know-testosterone...

   Get Your Testosterone Level Tested. Sounds obvious, but as many as a quarter of men receiving T therapy do it blindly—that is, they start a regimen without testing whether they actually have low ...