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However, free testosterone is difficult and expensive to measure (it requires a time-consuming dialysis step), and many laboratories do not offer this service. The free androgen index is intended to give a guide to the free testosterone level, but it is not very accurate (especially in males — see endocrine society commentary below).
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 ...
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
Low testosterone or testosterone deficiency, also known as hypogonadism, is a condition in which patients develop symptoms. ... A free testosterone test. This test only measures your unbound ...
According to American Urological Association, the diagnosis of low testosterone can be supported when the total testosterone level is below 300 ng/dl. [12] Some men with normal total testosterone have low free or bioavailable testosterone levels which could still account for their symptoms.
In addition to free testosterone, albumin-bound testosterone is also available for the body to use; these two types of testosterone are known as bioavailable testosterone.