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Placenta previa in singleton and twin births in the United States, 1989 through 1998: A comparison of risk factor profiles and associated conditions

Placenta PreviaMedicineGynecologyPregnancyMaternal HealthPreterm BirthMaternal-fetal MedicinePublic HealthUnited StatesReproductive EpidemiologyRisk Factor ProfilesEpidemiologyWomen's HealthHigh-risk Pregnancy