This test measures the amount of HDL ("good") cholesterol in your blood. It's one of several tests that can determine your risk for heart disease.

This test measures the amount of human chorionic gonadotropin (HCG) in your urine. It can tell whether you are pregnant within days of a missed period.

This test is used to find out if your levels of the hormone androgen are normal. The levels are different for men and women.

This test checks a sample of your amniotic fluid during pregnancy to find out if your baby may have fragile X syndrome, a rare genetic disorder.

This test measures the level of follicle-stimulating hormone (FSH), an important hormone made in your pituitary gland.

This test measures the amount of folate in either your serum or your red blood cells.

This test measures the amount of fluphenazine in your blood. This medicine is used to treat schizophrenia and Tourette's syndrome.

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.

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

A fecal occult blood test checks a stool sample for blood that can't be seen with the naked eye. Blood in the stool is a sign of bleeding in the digestive tract.