title: Letter: Ultrasound and mammalian D.N.A.
mesh_terms: D000818:Animals; D002417:Cattle; D004247:DNA; D005260:Female; D006801:Humans; D009154:Mutation; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014465:Ultrasonics / Q000009:adverse effects*
chemical_list: D004247:DNA