![]() ![]() Screening tests do not look only at results from the blood test. They compare a number of different factors (including age, ethnicity, results from blood tests, etc…) and then estimate what a person’s chances are of having an abnormality. This will help alleviate some of the anxiety that can accompany test results. It is very important to remember what a screening test is before getting one performed. The false-positive rate of the test is also lower. The screen is essentially the same as the screening tests that look for only three substances, except the likelihood of identifying pregnancies at risk for Down Syndrome is higher through the evaluation of Inhibin-A levels. However, the quad screen looks for not only the three specific substances evaluated in those tests (AFP, hCG, and Estriol) but also a fourth substance known as Inhibin-A. #Sequential testing in pregnancy plusThe quad screen is a maternal blood screening test which is similar to the Triple Screen Test (also know as AFP Plus and the Multiple Marker Screening). Inhibin-A: inhibin-A is a protein produced by the placenta and ovaries What is a Quad Screening Test? HCG: human chorionic gonadotropin is a hormone produced within the placentaĮstriol: estriol is an estrogen produced by both the fetus and the placenta The quad screen test is a maternal blood screening test that looks for four specific substances: AFP, hCG, Estriol, and Inhibin-A.ĪFP: alpha-fetoprotein is a protein that is produced by the fetus ![]() Supplements and Medications for a Healthy Pregnancy. ![]()
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