Background Placenta previa is defined as the placenta overlying the endocervical os. In the
past, previas were characterized as complete, partial, and marginal depending on how …

The prevalence of smoking during pregnancy varies markedly across countries. In many
industrialized countries, prevalence rates appear to have peaked and begun to decline …

This presentation of the diseases of the placenta differs in many ways from the first such
treatment in these volumes by the eminent Robert Meyer. It is a deliberate attempt to bring …

Placenta previa, placenta accreta, and vasa previa are important causes of bleeding in the
second half of pregnancy and in labor. Risk factors for placenta previa include prior …

Given that practice variation exists in the frequency and performance of ultrasound and
magnetic resonance imaging in pregnancy, the Eunice Kennedy Shriver National Institute of …

Objective: Several clinical and epidemiologic studies have reported disparate data on the
prevalence rate as well as risk factors associated with placenta previa-a major cause of third …

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Objective: Our purpose was to determine the incidence of placenta previa based on the
available epidemiologic evidence and to quantify the risk of placenta previa based on the …

Objectives: This study was to report the incidence of severe maternal morbidity associated
with hypertensive disorders of pregnancy in the United States. Study Design: We used data …

The authors carried out an epidemiologic study to evaluate the role of maternal cigarette
smoking as a potential risk factor for placental abruption, placenta previa, and uterine …