Types of Ultrasounds

There are a several different types of ultrasounds, and they are performed for different reasons during the course of your pregnancy.

• Standard 2-D: This is the most commonly performed ultrasound. The images are in two dimensions, the standard for viewing on a video screen. Nearly all of the above tests (such as verification of gestational age, number of babies, and anatomy survey) can be performed with this technology. The procedure usually lasts about 20 minutes.

• Advanced Ultrasound (also called level II or targeted ultrasound): This is similar to the standard ultrasound, but the purpose is to target suspected problems. This can take as little as 30 minutes or as long as a few hours to perform.

• Transvaginal Ultrasound: A special long and narrow transducer, protected by a single-use cover or sheath, is introduced into the vagina to send out sound waves and gather reflections. It’s mostly done in the early stages of pregnancy. The main advantage is improved imaging because the transducer is much closer to the structures being investigated than it would be using the abdominal approach. The trade-off is not as much depth of imaging. Unlike the standard ultrasound, a transvaginal ultrasound is usually performed on an empty bladder.



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