What is the difference between the AFP, triple screen and quad screen?
The triple screen test combines the AFP with two other markers to screen for genetic problems. A sample of the mother’s blood is drawn and three areas are tested: the AFP, the level of estriol and the level of hCG; both secreted by the placenta. These are all hormones produced by the baby and found in the mother’s bloodstream. The quad screen tests a fourth marker called inhibin which is also produced by the placenta. Results can be obtained from a lab in about one week. Read on • Prenatal Testing • Deciding Whether or Not to Have Prenatal Testing • New Blood Test Detects Down Syndrome If I have a quad screen, do I need 4 vials of blood drawn? If a triple or quad screen is done, all markers can be tested from the same tube of blood. Are there risks to the AFP? There are no inherent risks to the AFP other than indicating a possible need for additional testing such as amniocentesis. What if my AFP test result is high? If your level of AFP is high, it might not be a sign that your baby ha
