title: A prospective study of the use of ultrasound in vaginal legal abortion before 20 weeks of pregnancy.
authors.forename: C W
authors.initials: CW
authors.lastname: Helm
authors.forename: D J
authors.initials: DJ
authors.lastname: Maxwell
authors.forename: R J
authors.initials: RJ
authors.lastname: Lilford
mesh_terms: D000028:Abortion, Induced; D003933:Diagnosis; D005193:Family Planning Services; D015994:Incidence; D010808:Physical Examination; D011446:Prospective Studies; D012106:Research; D012107:Research Design; D014465:Ultrasonics
keywords: Abortion, Induced--complications; Examinations And Diagnoses; Family Planning; Fertility Control, Postconception; Incidence; Measurement; Physical Examinations And Diagnoses; Prospective Studies; Research Methodology; Studies; Ultrasonics--therapeutic use