Case Age (years) G P Sonographic findings at 23-25w Sonographic findings at 23-25w Sonographic findings at 23-25w Sonographic findings at 31-33w Sonographic findings at 31-33w Sonographic findings at 31-33w
Placental position Cord insertion Vasa previa judgement Placental position Cord insertion Vasa previa judgement
1 32 4 1 anterior to posterior via right velamentous inconclusive anterior to posterior via right velamentous inconclusive
2 29 2 0 anterior low-lying normal no sign anterior low-lying suspected tiny velamentous but inconclusive inconclusive
3 36 3 1 anterior to posterior via right normal no sign anterior to posterior via right suspected tiny velamentous but inconclusive inconclusive
4 36 2 0 anterior low-lying velamentous no sign anterior low-lying velamentous inconclusive
5 34 3 0 posterior low-lying velamentous no sign posterior low-lying velamentous inconclusive, fetal head low
6 30 1 0 posterior velamentous displayed posterior velamentous inconclusive, fetal head low
7 38 4 1 right-anterior and posterior bilobes, posterior low-lying normal suspected bridge vessel previa but inconclusive right-anterior and posterior bilobes, posterior low-lying normal suspected bridge vessel previa but inconclusive
8 31 3 0 left low-lying normal inconclusive left low-lying normal inconclusive
9 32 3 0 MCDA anterior to posterior normal inconclusive MCDA anterior to posterior normal inconclusive
10 36 4 1 anterior to posterior normal no sign anterior to posterior normal inconclusive
11 30 1 0 anterior to right normal no sign anterior to right normal inconclusive
12 35 3 1 anterior and posterior bilobes, anterior low-lying normal bridge vessel previa displayed bilobed anterior and posterior respectively velamentous suspected bridge vessel previa but inconclusive