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This test measures how much iron is in your blood. Too much or too little iron can cause health problems.

This test measures the amount of a protein made during pregnancy. It can help your doctor know if you are at risk for premature delivery.

Fetal echocardiography (echo) uses sound waves to check the heart of your developing baby. Learn why the test is used, and what to expect before, during, and after this test.

Teeth that have tooth decay must be repaired. Advances in dental materials and methods provide new, effective ways to restore teeth.

Fluoride helps prevent tooth decay, strengthens tooth enamel, and reduces the harmful effects of plaque.

Medicine rashes are the body’s reaction to a certain medicine. The type of rash that occurs depends on the type of medicine that is causing it. Rashes can range from mild to severe.

Fleas, mites, and chiggers are different kinds of small insects. They are also parasites. This means they feed off the blood, skin, or both of animals and humans. These insects are more common in the warm weather. They bite skin and cause symptoms, such as bumps, redness, pain, or itching.

Reye syndrome is a rare but very serious illness that causes brain swelling and liver damage. It can also affect all the body’s organs.

Retinoblastoma is a rare cancer of the retina of the eye. The retina is in the back of the eye. It’s the part of the eye that receives light. Retinoblastoma is the most common tumor affecting the eye in children. It almost always occurs in children less than 5 years old.