Transcription: Ultrasound, or ultrasonography, is a non-evasive, painless technique for examining internal organs. Because it does not involve the use of x-rays, it is safe to use in the care of pregnant women. Ultrasound technology makes it possible to monitor the progress of a developing fetus and to diagnose abnormalities long before the baby is born. In an ultrasound examination, a transducer is passed over the surface of the skin. The transducer emits high frequency sound waves inaudible to humans. The transducer receives echoes of these sound waves. The pattern of the echoes reflects changes of density ...
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