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A gestational age of 20 weeks would show a normal aortic measurement of ___ mm.

Which one of the following types of imaging is used to evaluate cardiac motion?

Which one of the following anomalies is associated with micromelia and a “hitchhiker thumb?”

Kidneys should be sonographically documented in all fetuses beginning at ______ weeks’ gestation.

A normal amniotic fluid volume cannot exclude renal agenesis before _____ weeks’ gestation.

Fusion of the lower extremities is associated with which one of the following?

The bladder wall thickness in a fetus is normally _____ mm.

Decreasing the spatial pulse length  ______________________

In Doppler, the number of pulses per scan line is called  _____________________

Attenuation denotes _______________________