Fetal blood sampling is a procedure used to diagnose, treat or monitor various fetal problems. Using a very small needle, specialists in Maternal-Fetal Medicine are able to remove a tiny amount of blood from the fetus during pregnancy.

This procedure is performed to:

• Determine blood type
• Diagnose genetic or chromosome abnormalities
• Diagnose possible fetal infections
• Identify possible fetal anemia (low red blood cell count)
• Identify possible low platelet count

How is this procedure performed?

1. This procedure is performed using continuous ultrasound guidance to place a needle through the maternal abdomen into a tiny fetal blood vessel.
2. A sample of fetal blood can then be sent for testing.

Will I need to have a full bladder?

Sometimes but usually not.

When will I get the results?

Your physician can advise you regarding when to expect the results, as result times do vary depending on the kind of test.