Testosterone: What To Think About
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What To Think About
- Most of the testosterone in the blood is bound to a protein called sex hormone binding globulin (SHBG). "Free" testosterone may be checked when conditions that can increase SHBG levels, such as obesity or hyperthyroidism, are present.
- The levels of other hormones made by the pituitary gland, such as follicle-stimulating hormone (FSH) and luteinizing hormone (LH), may be checked to see whether a low testosterone level is caused by problems with the testicles or ovaries or the pituitary gland. For more information, see the medical tests Luteinizing Hormone and Follicle-Stimulating Hormone. A really high level of LH and a low level of testosterone often means that the testicles or ovaries are not working properly. A low LH level and a really low or high testosterone level may mean a problem with the pituitary gland.
- For women, medicines such as birth control pills or corticosteroids may lower levels of testosterone. Oral estrogens used for hormone replacement therapy can also lower testosterone levels.
| Last updated: | May 29, 2008 |
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| Author: | Bets Davis, MFA |
| Reviewed By: | Martin Gabica, MD - Family Medicine, David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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