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ACOG practice patterns. Routine ultrasound in low-risk pregnancy. Number 5, August 1997. American College of Obstetricians and Gynecologists.

The accepted indications for ultrasound during pregnancy are numerous (1). Approximately 60% to 70% of pregnant women in the United States undergo ultrasound at various times in gestation (1, 2). The purpose of this document is to present evidence regarding benefit or lack of benefit of routine ultrasound in women with low-risk pregnancy who do not already have an indication for ultrasound use.