title: Routine obstetric sonography.
authors.forename: Roy A
authors.initials: RA
authors.lastname: Filly
authors.forename: James P
authors.initials: JP
authors.lastname: Crane
mesh_terms: D000328:Adult; D003955:Diagnostic Tests, Routine; D019317:Evidence-Based Medicine; D005260:Female; D005333:Fetus / Q000002:abnormalities; D006801:Humans; D008403:Mass Screening; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D016216:Ultrasonography, Prenatal