title: Ultrasonographic cervical length and risk of hemorrhage in pregnancies with placenta previa.
authors.forename: Tullio
authors.initials: T
authors.lastname: Ghi
authors.forename: Aly
authors.initials: A
authors.lastname: Youssef
mesh_terms: D002584:Cervix Uteri / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D010923:Placenta Previa / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D012307:Risk Factors; D014463:Ultrasonography; D014592:Uterine Hemorrhage / Q000209:etiology*