Routine ultrasound in low-risk pregnancy American College of Obstetricians and Gynecologists. 1997 Aug. 5 pages. Not available on line. From the National Guideline Clearinghouse summary: "In a population of women with low-risk pregnancy, neither a reduction in perinatal morbidity and mortality nor a lower rate of unnecessary interventions can be expected from routine diagnostic ultrasound. Thus ultrasound should be performed for specific indications in low-risk pregnancy."