: A measurement under 3.0–3.5 mm is generally considered within the normal range.

A dating scan combined with a Nuchal Translucency (NT) measurement is a routine screening performed between of pregnancy. It identifies the risk for certain chromosomal conditions, such as Down syndrome, by measuring the fluid-filled space at the back of the baby's neck . Understanding the NT Measurement

High risk; further diagnostic testing is usually recommended.

The NT measurement is recorded in millimeters (mm) and is compared to what is average for a baby of the same gestational age.

May indicate a slightly increased risk in some cases, often requiring plotting against the baby's length.

: A measurement of 3.5 mm or more is considered higher than average and may indicate an increased risk for chromosomal or genetic conditions, or physical anomalies like heart defects.

Very high risk for chromosomal abnormalities and other birth defects. What a "Helpful Report" Includes