The quad screen measures levels of alpha-fetoprotein (AFP), human chorionic gonadotropin (HCG), estriol and inhibin A in pregnant women's blood.

What does an abnormal quad screen mean?

What does an abnormal result mean? The quad screen only checks your risk. It doesn't tell you if your baby will have a genetic disorder. So, an abnormal result means you may need further testing. It can also mean your baby is older than you and your healthcare provider thought.

What is the quadruple marker screen used to detect?

The quad marker screen is a blood test that provides useful information about a pregnancy. It can help estimate your baby's risk of Down syndrome, Edward's syndrome (trisomy 18), and neural tube defects. The test predicts the likelihood of a problem. It does not diagnose the problem.