FREE TESTOSTERONE (THY)
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- This test measures the amount of unattached, or "free," testosterone in your blood.
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- This test measures the amount of unattached, or "free," testosterone in your blood. Testosterone is a male sex hormone (androgen) that helps male features develop. Most testosterone is made in the testes (in men) and the ovaries (in women). A small amount is made in the adrenal glands.