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 …

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 …

Monochorionic twin pregnancies are at increased risk of adverse outcome because of the
vascular anastomoses that connect the 2 fetal circulation systems. The shared circulation is …

We sought to evaluate the extent of the association between placental implantation
abnormalities (PIA) and preterm delivery in singleton gestations. We conducted a systematic …

OBJECTIVE: To evaluate outcomes and predictors of neonatal survival in pregnancies
complicated by vasa previa and to compare outcomes in prenatally diagnosed cases of vasa …

Objectives To determine the prevalence of, and risk factors for anomalous insertions of the
umbilical cord, and the risk for adverse outcomes of these pregnancies. Design Population …

OBJECTIVE Velamentous cord insertion may be identified prenatally, but the clinical
implications of this diagnosis remain controversial. This meta-analysis aimed to …

Objective Vasa previa is an obstetric complication in which the fetal blood vessels lie outside
the chorionic plate in close proximity to the internal cervical os. In women with vasa previa …

Placental implantation abnormalities, including placenta previa, placenta accreta, vasa
previa, and velamentous cord insertion, can have catastrophic consequences for both …

Objective To evaluate the role of ultrasound in prenatal diagnosis of vasa praevia (VP) and
to asses the risk of VP associated with different causal factors. Material and Methods A …