Nikolas
Created page with "Placenta praevia refers to the situation when the placenta partially or completely covers the internal os of the cervix. This makes vaginal birth impossible and increases the risk for preterm delivery and severe postpartum haemorrhage. Also related are the marginal and low-lying placentas. Placenta praevia is associated with the placenta accreta spectrum disorders (accreta, increta, percreta). == Etiology == The cause of placenta praevia is unknown. Some risk factors i..."
