The correct name should be Twin Fetal Transfusion Syndrome, which is a very serious complication of twin births, with a fetal mortality rate that can reach 70-100%. It occurs mainly in monozygotic twins, which are monochorionic with two amniotic sacs. There is vascular traffic between the two chorionic villi, and blood from one fetus is constantly transfused to the other. The blood-supplying fetus becomes anemic, atrophic, and intrauterine, and eventually turns into a papery baby, and the blood-supplying fetus becomes edematous, with enlarged and edematous organs.