The following values are general reference points for NT scans conducted within the 11–13 week window: Measurement Interpretation Risk of Down syndrome is considered very low. 1.3 – 2.5 mm Standard normal range for most babies. 2.5 – 3.0 mm
The NT measurement is recorded in millimeters (mm) and is compared to what is average for a baby of the same gestational age. Dating Scan Nt Measurement
: A measurement under 3.0–3.5 mm is generally considered within the normal range. The following values are general reference points for
May indicate a slightly increased risk in some cases, often requiring plotting against the baby's length. Dating Scan Nt Measurement