- It is thought that vasa praevia occurs in approximately 1:2,500 births.
- If the condition is not diagnosed prenatally, the fetal mortality rate is estimated to be as high as 95%.
- In cases diagnosed prenatally (absent other congenital defect) the infant survival rate is 100%.
- VASA PRAEVIA Raising Awareness are not aware of any prenatally diagnosed case which has resulted in the loss of the infant
- NB. In IVF pregnancies the frequency is 1:300