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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
Normal total testosterone levels depend on the man's age but generally range from 240 to 950 ng/dL (nanograms per deciliter) or 8.3–32.9 nmol/L (nanomoles per liter). [11] According to American Urological Association, the diagnosis of low testosterone can be supported when the total testosterone level is below 300 ng/dl. [12]
Testosterone, total Refs Endocrine Society: United States: 100–200 pg/mL <50 ng/dL [1] World Professional Association for Transgender Health (WPATH) United States "[T]estosterone levels [...] below the upper limit of the normal female range and estradiol levels within a premenopausal female range but well below supraphysiologic levels."
More specifically, optimal levels are generally close to a central tendency of the values found in the population. However, usual and optimal levels may differ substantially, most notably among vitamins and blood lipids, so these tables give limits on both standard and optimal (or target) ranges.
This is because testosterone levels in men are about 100 to 1,000 times higher than estradiol levels in women (300 to 1,000 ng/dL vs. 50 to 150 pg/mL, respectively). [50] Non-scrotal testosterone patches were assessed and were found to be ineffective in raising testosterone levels in men. [50]
So-called normal levels of testosterone are approximations, but can help researchers investigate disease and treatments. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please ...
True, testosterone does have to do with libido: “It’s pretty clear that increased testosterone levels improve sex drive, and that likely leads to more sex,” says James M. Hotaling, MD, MS ...
Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.