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Progesterone
This test measures the level of a hormone called progesterone in your blood. You may need this test if you are having trouble getting pregnant.
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Prolactin (Blood)
This test measures the level of prolactin in your blood. The test can help find out if you have a pituitary gland tumor.
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Protein C (Blood)
This test measures the level of protein C in your blood. If you have too little protein C, called a protein C deficiency, it means that your blood may clot too much.
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Protein Electrophoresis (Blood)
Protein electrophoresis is a test that measures specific proteins in the blood.
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Protein S (Blood)
This test measures levels of protein S, a protein in the blood that helps it to clot.
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Protoporphyrin (Blood)
The protoporphyrin test is used to diagnose blood problems caused by lead. The test can show lead exposure or lead poisoning.
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Prostate-Specific Antigen (PSA)
This test measures the level of prostate-specific antigen (PSA) in your blood. If your PSA levels start to rise, you may have prostate cancer.
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Prothrombin Time
This test is one of several that looks at how well your blood clots. Your doctor may use this test to help diagnose a blood clotting disorder.
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Quantitative Immunoglobulins
This test measures the amount of antibodies called immunoglobulins in your blood. The test can tell whether you are lacking in one or more of these antibodies.
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