… test and ultrasonography in the 1st trimester or 2nd trimester. … Down syndrome, but it shows
a high risk of Down syndrome. … the aneuploid fetus during the first and second trimester. It is …

… that Down syndrome … fetal Down syndrome screening, including cell-free fetal DNA in
maternal plasma, maternal serum biomarkers in the first and second trimester, and ultrasound …

… internal and surgical diseases, as well as mothers whose pregnancies exhibited fetal
structural abnormalities, detected by ultrasound at 20 weeks, or whose pregnancies resulted from …

… ultrasound is most effective for Down syndrome detection … sonographically in the second
trimester.[5] The prevalence of detectable structural anomalies in fetuses with Down syndrome, …

… undergo serum screening for Down syndrome in the second trimester, either with … fetus’s
neck by B-ultrasound and is used to assess whether the fetus is likely to have Down syndrome …

… of Down syndrome screening (23%), high NT ultrasound (4.9… weeks of pregnancy; using
ultrasound to scan the fetal neck … (23%) at high risk of Down syndrome in the screening test, and …

… Down syndrome (DS) is one of the most common chromosomal aneuploidy diseases, and …
and appropriate management of these fetuses[2]. Second trimester maternal serum screening …

… enough nor sensitive as a marker of Down syndrome at second trimester scans [66]. In a …
chromosomal aneuploidy detected in fetuses with isolated EB was Down syndrome (PP: 2.4…

… fetal EB. No karyotyping was performed in the isolated cases after the second trimester
ultrasonography … a poor marker of Down syndrome in the second trimester in Korean population. …

… ultrasound to observe the size and shape of a normal fetal … The pregnancy would be
terminated if Down syndrome is … There were also studies that showed that Down syndrome …