PMC4103493_01
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).
f1000research-2-3140-g0000.jpg
PMC4103493_01_f1000research-2-3140-g0000.jpg
f1
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).