A quadruple test, also called a quadruple marker test, quad screen, quad test or second-trimester screen, is a prenatal test used to measure levels of 4 substances in an expectant mother’s blood. These 4 substances are: Human chorionic gonadotropin (HCG): This hormone is made by the mother’s placenta. Inhibin A: It is another hormone made by the mother’s placenta. Alpha-fetoprotein (AFP): This protein is made by the developing baby. Estriol: This hormone is made by the baby’s liver and the mother’s placenta. The quad test is usually carried out between…
Read MoreWhat is Quadruple Test in Pregnancy and Why is it Important?
