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Biparietal Diameter to Femur Length Ratio

Specialty:

Nephrology, Urology, Obstetrics & Gynecology, Pedatrics, Genetics
Nephrology, Urology, Obstetrics & Gynecology, Pedatrics, Genetics

Objective:

ICD-10:

Description:

The ratio of biparietal diameter to femur length at 15 to 23 weeks of gestation (menstrual age) can be used to identify fetuses at risk for Down syndrome. Infants with Down syndrome have shortening of the femur, which contributes to an increase in the ratio above normal.

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