Prenatal ultrasound and Vasa Previa in Twin Pregnancies
This study by Jauniaux et al. (AJOG, 2017) sought to determine how prenatal ultrasound imaging can be used to diagnose and manage twin pregnancies diagnosed with vasa previa.
Systematic Review and Case Series
This systematic review surveyed 56 cases, 11% of which had twin pregnancies diagnosed with vasa previa prenatally. In pregnancies diagnosed with vasa previa, velamentous cord insertion was the most common additional ultrasound finding. Using their internal database, the authors found six cases of dichorionic-diamniotic twins and one case monochorionic-diamniotic twins diagnosed antenatally with vasa previa that were subsequently managed using cervical length imaging. Data on the diagnosis and management of vasa previa in twin pregnancies is limited but sufficient to call for guidelines for targeted screening.
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