title: Why (not) do obstetric ultrasound? An observation on uncertainty.
authors.forename: K L
authors.initials: KL
authors.lastname: Reed
mesh_terms: D005260:Female; D006801:Humans; D009774:Obstetrics / Q000639:trends; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016216:Ultrasonography, Prenatal / Q000639:trends*; D014481:United States