PU Fetal Biometry and Growth Assessment 3

Question 1

What condition is suggested when all fetal biometric measurements are proportionally small?

Accepted Answer

Symmetric IUGR

Answer

When all measurements (BPD, HC, AC, FL) are equally reduced, it suggests symmetric IUGR, often due to early insults such as genetic abnormalities or infections.

Question 2

Which ultrasound parameter is used to calculate the ponderal index as an indicator of fetal nutrition?

Accepted Answer

Estimated fetal weight and femur length

Answer

The ponderal index uses estimated fetal weight relative to femur length to assess fetal body proportions and nutritional status.

Question 3

At what gestational age is crown-rump length (CRL) the most accurate dating tool?

Accepted Answer

6–12 weeks

Answer

Crown-rump length measurement is most accurate for gestational dating between 6 and 12 weeks, with an accuracy of ±3–5 days.

Question 4

What is the significance of an abdominal circumference crossing two major percentile lines downward on a growth chart?

Accepted Answer

It suggests developing IUGR requiring further evaluation

Answer

A downward crossing of two major percentile lines on a growth chart indicates decelerating fetal growth, which is a significant finding requiring further assessment.

Question 5

Which formula specifically accounts for asymmetric head shape when estimating gestational age?

Accepted Answer

HC-based formula

Answer

Head circumference-based formulas are preferred over BPD-based formulas because HC is not affected by fetal head shape variations.

PU - Pregnancy Ultrasound Certification Practice Test

PU - Pregnancy Ultrasound Certification Practice Test

PU Fetal Biometry and Growth Assessment 3