It is uncertain how best to screen pregnant women for the presence of fetal Down's syndrome: to perform first-trimester screening, to perform second-trimester screening, or to use strategies ...

Oct. 14, 2002 — Measuring nuchal translucency in the early second trimester may be the best single test for fetal trisomy 21 and other chromosomal abnormalities, according to a report in the October ...

If you’re pregnant, your doctor might have mentioned an NT scan or first-trimester screening. An NT scan is a simple test that shows your baby’s risk for some genetic conditions. What Is an NT Scan ...

The aim of this study was to examine fetal and neonatal outcomes in the setting of nuchal translucency (NT) ⩾3 mm at routine first-trimester screening. A nested case-series study within a ...

How does down syndrome occur? Down syndrome occurs when the baby receives an extra chromosome (trisomy 21). It can occur at any age but is more common in older woman. A definite diagnosis of Down ...

Screening for aneuploid pregnancies is routinely performed after 15 weeks of gestation and has a sensitivity of approximately 65 percent, with a false positive rate of 5 percent. First-trimester ...

Purpose: To assess nuchal translucency measurements that were performed as part of routine prenatal screening for Down syndrome. Methods: Collect ultrasound measurements of nuchal translucency and ...