title: Placenta previa in twin gestations.
abstract: The incidence of placenta previa in twin gestations was compared to that found in singleton pregnancies over a ten-year period. During this period, eight placenta previas occurred in 1,464 twin pregnancies, for an incidence of 0.55%, which was significantly higher (P less than .05) than the incidence of 0.31% in singleton pregnancies (458 placenta previas in 148,197 singleton pregnancies). We conclude that a twin gestation confers an added risk of placenta previa.
authors.affiliation: Department of Obstetrics and Gynecology, University of Southern California School of Medicine and Women's Hospital, Los Angeles 90033.
authors.forename: T H
authors.initials: TH
authors.lastname: Strong
authors.forename: H S
authors.initials: HS
authors.lastname: Brar
mesh_terms: D001724:Birth Weight; D015331:Cohort Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D010298:Parity; D010923:Placenta Previa / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D011247:Pregnancy; D012307:Risk Factors; D014427:Twins; D014463:Ultrasonography