Study finds ultrasound procedures falling short.
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D005260:Female; D006302:Health Services Research; D006801:Humans; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D011787:Quality of Health Care; D012955:Societies, Medical; D014465:Ultrasonics; D016216:Ultrasonography, Prenatal / Q000592:standards*; D014481:United States