<prompt> All are causes of Antepartum hemorrhage APH except:Placenta previaAbruptio placentaCircumvallate placentaBattledore placenta  <response>: Causes of Antepartum HemorrhagePlacenta previaAbruptio placentaVasa previaCircumvallate placentaLocal causes like:PolypCarcinoma cervixVaricose veinsTraumaUnclassified or indeterminateCircumvallate placentaIt is an uncommon cause of antepartum hemorrhage.In this condition, the chorionic plate which is on the fetal side of the placenta is smaller than the basal plate on the maternal side.The fetal surface of the placenta presents a central depression surrounded by a thickened grayish white ring.These pregnancies may be complicated by IUGR and an increased chance of fetal malformations.Bleeding is usually painless.Antenatal diagnosis is unlikely and the diagnosis is usually made after examination of the placenta post delivery. 