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Testosterone

Also known as: Total testosterone
Formal name: Testosterone
Related tests: Follicle stimulating hormone (FSH), Luteneizing hormone (LH), Sex hormone binding globulin (SHBG), Free and bioavailable testosterone (see FAQ section), Dihydrotestosterone (DHT), Estradiol (see Estrogen), Gonadotropin-releasing hormone, Dehydroepiandrosterone sulfate (DHEAS)
At A Glance
 
Why get tested?
To determine abnormal testosterone level in males and females; in males, an abnormal level may help to explain difficulty getting an erection (erectile dysfunction), inability of your partner to get pregnant (infertility), or premature or delayed puberty; in females, to explain the appearance of masculine physical features (virilization), inability to get pregnant, and as a marker for polycystic ovary syndrome (PCOS)

When to get tested?
If you are male and your doctor thinks that you may be infertile or if you are unable to get or maintain an erection; if you are a boy with either early or delayed sexual maturity; if you are a female but have male traits, such as a low voice or excessive body hair (hirsutism), or have amenorrhea, or are infertile

Sample required?
A blood sample drawn from a vein in your arm



This article was last reviewed on February 11, 2009.
This page was last modified on April 8, 2009.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
The modified date indicates that one or more changes were made to the page. Such changes may or may not result from a full review of the page, so the two dates may not always agree.
 
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