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Know the signs of oral cancer. You can check your mouth for early signs of oral cancer.

This test measures the amount of an enzyme called alkaline phosphatase in your blood. It can help your doctor diagnose certain liver conditions.

This test checks a sample of amniotic fluid. The sample can help tell if your baby has a birth defect called an open neural tube defect.

This test looks for a deficiency in a protein called factor V. This protein is one of your body's "clotting factors." When you have too little factor V, you may have bleeding problems.

This test looks for abnormal proteins in your blood plasma. These abnormal proteins may mean you have a life-threatening disease called cryofibrinogenemia.

This test checks for antibodies that may be found in people with abnormal blood clots or autoimmune diseases.

This is a 2-part test to look for THC in your urine. THC is the active ingredient in marijuana.

This test looks for signs of chemical poisoning in your blood. You may need this test if your doctor thinks you have been overexposed to insecticides.

Graves disease is an autoimmune disease. With this disease, antibodies cause the thyroid gland to make too much thyroid hormone. This is known as hyperthyroidism. Excess thyroid hormone in the bloodstream leads to the body's metabolism being too active. It can cause problems such as weight loss, nervousness, fast heartbeat, tiredness, and other issues. It’s an ongoing (chronic) condition that needs lifelong treatment.