Prenatal ultrasonographic diagnosis of circumvallate placenta

Results This lady was referred to our perinatology unit at 33 week's gestation for vaginal bleeding and abdominal pain. There were slight vaginal bleeding and minimal uterine contractions. Ultrasonographic examination revealed a single live fetus compatible with gestational age and circumvallate placenta (Fig 1). She received two doses of dexamethasone for accelerating fetal lung maturation. Two days later she was discharged and informed about the risks. Two weeks after, she represented with premature rupture of membranes and bleeding. There was a severe abdominal pain with intense bleeding. She was delivered by emergency cesarean section due to a suspicion of placental abruption. A baby was delivered with APGAR scores of 6 and 8, weighing 2300 g at 33 weeks' gestation. The fetal surface of the placenta showed a marginal fold of the chorion and a projection of villous tissue beyond the edge of the chorion plate. The circumvallate placenta was obvious in macroscopic views (Fig 2).