title: [Ultrasound--what everybody saw, but nobody heard].
authors.forename: Bjørn
authors.initials: B
authors.lastname: Hofmann
mesh_terms: D005260:Female; D049673:History, 20th Century; D006801:Humans; D009664:Norway; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000941:ethics / Q000266:history