Nuchal Translucency

First trimester screening. NT measurement and risk.

Fetal Biometry

Crl

Age

NT Result

NT Value1.8mmActual

Screen StageLower Risk / Normal

The measurement is within the expected range for this gestational age.

Clinical Interpretation

Screening Thresholds

Normal< 2.5 mm

Increased2.5 - 3.4 mm

Abnormal≥ 3.5 mm

Disclaimer: This tool is for informational purposes only and is not a substitute for professional medical advice.

Overview

NT is fluid behind fetal neck at 11–14 weeks. Increased NT associated with chromosomal abnormalities, cardiac defects. Combined with serum for risk.

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Pro Tips

11–14 weeks optimal.
Trained sonographer.
Counsel on options.

Fun Facts

"Screening, not diagnostic."
"Combined with PAPP-A, hCG."
"NIPT adds information."

Formula: MoM = Measured NT / Expected NT for CRL. Risk from combined test.

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