case_images: PMC4103493_01
case_images: Doppler images showing blood flow through a vasa previa vessel over the internal os between the anterior placental cord insertion and the posterior succenturiate lobe (arrow).
case_images: f1000research-2-3140-g0000.jpg
case_images: PMC4103493_01_f1000research-2-3140-g0000.jpg
case_images: f1
case_images: A vessel coursing over the internal os between the anterior placental cord insertion and a posterior succenturiate lobe was identified on ultrasound (type 2 vasa previa, see Figure 1).