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Alternative names
PRLDefinition Return to top
This is a blood test that measures the amount of the hormone prolactin.How the test is performed Return to top
Adult or child:How to prepare for the test Return to top
Adults:How the test will feel Return to top
When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.Why the test is performed Return to top
Serum prolactin is usually measured as part of the diagnostic work-up of pituitary tumors, menstrual irregularities, infertility, impotence, and galactorrhea (breast milk production).
Prolactin is a protein hormone secreted from the anterior pituitary gland. Prolactin stimulates breast development and milk production in females. There is no known normal function of prolactin in males.
Normal Values Return to top
The normal values for prolactin are as follows:
What abnormal results mean Return to top
Prolactin levels can be elevated in the following conditions:
If your prolactin levels are elevated, the test may be repeated following an 8-hour fast.
What the risks are Return to top
Special considerations Return to top
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others. Stress, recent exercise, and a recent breast examination can transiently increase prolactin levels. Update Date: 4/29/2003 Updated by: A.D.A.M. editorial. Previous review: Mary D. Ruppe, Division of Endocrinology and Metabolism, Johns Hopkins Hospital, Baltimore, MD. Review provided by VeriMed Healthcare Network (2/17/2002).
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Page last updated: 28 October 2004 |