Rh typing is very important during pregnancy. If you are Rh negative and your baby is Rh positive, you may have an Rh incompatibility.

This test looks for antibodies to red blood cells (RBCs) in your blood. These antibodies can cause problems during blood transfusions or, if you're pregnant, with your unborn baby.

This test looks for signs of syphilis, a sexually transmitted disease that can cause serious health problems if not treated.

This test is 1 of several that looks at how well your blood clots. Your healthcare provider may use this test to help diagnose a blood clotting disorder.

This test measures levels of protein S, a protein in the blood that helps it to clot.

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.

This blood test measures proinsulin, a building block for insulin. Measuring proinsulin in your blood can help figure out your risk for type 1 or type 2 diabetes.

The prealbumin screen is a blood test to see whether you are getting enough protein in your diet.

This test measures the amount of potassium in your blood. It's often part of a routine blood test to check your level of electrolytes.

A cocaine screen is a test done to find out whether you have used cocaine recently. The test can be done on your urine, saliva, blood, hair, or sweat.