This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.

This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.

This test measures the amount of alcohol, or ethanol, in your blood. This test is used by law enforcement agencies and hospitals to find out the concentration of alcohol in a person's blood.

This test measures the amount of estradiol (E2), the form of estrogen made mainly by the ovaries.

This test measures how much of the hormone erythropoietin you have in your blood. You may need this test to figure out what kind of anemia you have.

This blood test is used to find out if you may have an active disease process in your body.

This test looks for several types of receptors on cells in a sample of breast cancer tissue. It helps your doctor figure out which type of breast cancer you have.

This test measures the main electrolytes in your body: sodium, chloride, potassium, and carbon dioxide.

This is a blood test that checks for antibodies to the Epstein-Barr virus. This virus can cause mononucleosis or other conditions in some people.

The direct antiglobulin test, or direct Coombs test, is a blood test used to diagnose a type of anemia caused by your immune system.