title: Question of risk still hovers over routine prenatal use of ultrasound.
mesh_terms: D000818:Animals; D002869:Chromosome Aberrations; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000009:adverse effects*; D051381:Rats; D012306:Risk; D014465:Ultrasonics / Q000009:adverse effects*