Ballantyne syndrome is characterized by the triad of fetal, placental and maternal edema. It is a rare condition associated with fetal hydrops, in which the mother reflects fetal symptoms. It is essential to differentiate it from preeclampsia, since there are common signs such as hypertension and proteinuria. The etiopathogenesis is unknown, although theories associated with an imbalance between angiogenic and antiangiogenic factors have been postulated. Its treatment consists of terminating gestation or improving the fetal situation. It has a significant impact on fetal morbidity and mortality; however, the mother usually recovers within a few days after termination of pregnancy.