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Sonographic Evaluation of Nasal Bone in the First Trimester and the Biparietal Diameter to Nasal Bone Ratio

Purpose:

To evaluate the length of a fetus's nasal bone using ultrasonography in order to detect aneuploidy.

Specialty:

Obstetrics & Gynecology
Pedatrics
Genetics

Objective:

imaging studies

ICD-10:

Z34

Description:

The absence or marked hypoplasia of nasal bone in early gestation can help to identify a fetus with aneuploidy. This finding can be combined with other sonographic and biochemical markers to reach a fairly accurate diagnosis.

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