title: A new classification of placenta previa: measuring progress in obstetrics.
authors.forename: Lawrence W
authors.initials: LW
authors.lastname: Oppenheimer
authors.forename: Dan
authors.initials: D
authors.lastname: Farine
mesh_terms: D005260:Female; D006801:Humans; D010923:Placenta Previa / Q000145:classification* / Q000000981:diagnostic imaging; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D014219:Trial of Labor; D016216:Ultrasonography, Prenatal