Erez, Offer Early preterm delivery due to placenta previa is an independent risk factor for a subsequent spontaneous preterm birth. [electronic resource] - BMC pregnancy and childbirth Aug 2012 - 82 p. digital Publication Type: Journal Article ISSN: 1471-2393 Standard No.: 10.1186/1471-2393-12-82 doi Subjects--Topical Terms: AdultCervix Uteri--pathologyFemaleHumansParityPlacenta Previa--diagnostic imagingPregnancyPregnancy, High-RiskPremature Birth--epidemiologyRecurrenceRetrospective StudiesRisk FactorsUltrasonography, PrenatalYoung Adult