Question
Does trisomy screening only check for the highest risk? When undergoing trisomy screening, is it only necessary to conduct further tests when the risk is high, and are moderate and low risks considered safe?
Answer
Case Analysis: Hello, generally speaking, only high-risk test results require further confirmation. Trisomy screening is a method that involves taking a pregnant woman’s serum to detect the concentration of alpha-fetoprotein and chorionic gonadotropin in maternal serum, and combines the woman’s due date, age, weight, and gestational age at the time of blood collection to calculate the risk coefficient of giving birth to a Down syndrome child. Guidance: The purpose of trisomy screening is to determine the risk level of fetal Down syndrome by analyzing the blood of pregnant women. If the trisomy screening result shows a higher risk of fetal Down syndrome, further diagnostic tests such as amniocentesis or chorionic villus sampling should be conducted.