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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
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).
“A morning blood test before 10 a.m. is the gold standard [for testing testosterone levels accurately],” says Dr. Welliver. That’s because your T levels are highest in the morning.
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.
Testosterone is involved in all the following, and more: Regulating your sex drive. Red blood cell production. Sperm production. Your body's ability to store and burn fat. Regulating your emotions ...
The aim of testosterone replacement therapy (TRT) is to increase low levels of testosterone, or hypogonadism. It is typically available as an injection, but a person may also take it orally or ...
Low testosterone can be identified through a simple blood test performed by a laboratory, ordered by a health care provider. Blood for the test must be taken in the morning hours, when levels are highest, as levels can drop by as much as 13% during the day and all normal reference ranges are based on morning levels. [9] [10]
He says that you might not need to know your testosterone level, either, if you're not having symptoms of low T. Who should test and why. ... Who should test and why. Skip to main content. Sign in ...
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