The Case of the Vampire Baby Case Report: Twin Reversed Arterial Perfusion Sequence

Twin reversed arterial perfusion (TRAP) sequence is a rare divergence of monozygotic monochorionic twin gestations resulting in an acardiac twin receiving its blood supply from an otherwise structurally normal twin via placental vascular anastomoses. If not managed, this unusual complication poses increased risks of heart failure in the viable twin, polyhydramnios, and parental mortality. This case report follows a primigravida second-trimester TRAP pregnancy, highlighting the necessity of serial observations and timely management to lessen morbidity and mortality.