What prenatal technique uses high-frequency waves to examine the characteristics of the foetus in utero?

Question

Quizplus · Accepted Answer

Ultrasound uses high-frequency waves to create images of the foetus in utero. Amniocentesis and chorionic villus sampling involve collecting and testing samples of amniotic fluid and placenta, respectively, and are not imaging techniques. Alpha-fetoprotein (AFP) is a blood test that can be used to screen for certain birth defects, but it is not an imaging technique.

What Prenatal Technique Uses High-Frequency Waves to Examine the Characteristics