Occurrence

• 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