ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

How might fetal movement be assessed during an ultrasound?

1. By measuring fetal heart rate

2. By observing active movement during live imaging

3. By assessing maternal reactions

4. By reviewing previous ultrasound images

The correct answer is: By observing active movement during live imaging

Observing active movement during live imaging is the most direct and effective method for assessing fetal movement during an ultrasound. In real-time ultrasound, clinicians can visualize the fetus as it moves, stretches, and changes positions. This dynamic observation provides immediate evidence of fetal activity and can be crucial for evaluating the well-being of the fetus. Active fetal movements are a positive indicator of fetal health, as they often reflect the nervous system’s maturity and are linked to factors like adequate blood flow and the general health of the fetus. By using live imaging, sonographers can accurately identify and document specific movements, such as kicks or changes in posture, providing valuable information about fetal behavior at that moment. The other options may provide some context but do not offer direct visual evidence of fetal activity. For example, measuring fetal heart rate primarily assesses the heart's function rather than movement, while maternal reactions may not always correspond accurately with fetal activity. Reviewing previous ultrasound images might show historical data on fetal movement but lacks the immediacy and relevance of assessing movements in real-time during the current examination. Therefore, live imaging is the most reliable option for assessing fetal movement.