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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

   Testosterone levels increase in adolescence after puberty and into early adulthood, and naturally decline over time, usually starting in a man’s 40s or fifties. However, this drop now seems to ...

4. Is a Testosterone Test Important? - AOL

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

   Skip the saliva tests—that only measures free testosterone, which comprises about 2 percent of your total T levels, explains andrology expert Charles Welliver, MD, associate professor of urology ...

5. Template:Testosterone levels in males and females - Wikipedia

   en.wikipedia.org/wiki/Template:Testosterone...

   Testosterone levels in males and females ; Total testosterone Stage Age range Male Female Values SI units Values SI units ; Infant: Premature (26–28 weeks) 59–125 ng/dL: 2.047–4.337 nmol/L

6. 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.

7. 5α-Reductase 2 deficiency - Wikipedia

   en.wikipedia.org/wiki/5α-Reductase_2_deficiency

   A high level of assay specificity is required to measure concentrations of DHT since serum T levels are generally 10-fold higher than DHT in young males. Endocrinological tests for T/DHT ratios can be difficult to interpret since the normal ratio level varies according to age and severity of 5αR2 activity impairment.