title: Placenta previa: the evolving role of ultrasound.
authors: Y
authors: Y
authors: Oyelese
mesh_terms: D036861:Delivery, Obstetric / Q000379:methods; D003951:Diagnostic Errors; D005260:Female; D006760:Hospitalization; D006801:Humans; D010923:Placenta Previa / Q000000981:diagnostic imaging* / Q000628:therapy; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000379:methods* / Q000639:trends