General Information About the Test
Test Process and Preparation
In the first stage, a perinatologist or obstetrician measures the fluid accumulation at the back of the baby's neck (NT - Nuchal Translucency) and the presence of the nasal bone via ultrasound. In the second stage, blood is drawn from the mother to check the PAPP-A and Free Beta-HCG hormone levels. All this data is converted into a risk ratio by a computer.
The double marker test is not a diagnostic (definitive diagnosis) test; it determines whether the risk group is "high" or "low". If the risk is high, it does not mean the baby is definitively affected; advanced tests such as Fetal DNA testing or CVS/Amniocentesis are recommended to clarify the situation.
Because the blood sample taken from the expectant mother does not contain hormones affected by food, whether you are fasting or full does not matter for the double marker test.
The information on this page is for informational purposes only. The results of medical tests must be evaluated by specialist physicians.
