Trap Sequence: Case Report

Abstract

TRAP (Twin Reversed Arterial Perfusion) sequence is a rare syndrome seen in monochorionic twin preg- nancies. It occurs in 1% of monochorionic twin pregnancies. It is characterized with a recipient fetus ex- hibiting lethal anomalies including acardia and a pump fetus supplying blood by vascular anastomosis in the placenta. Pump twin is structurally normal but heart failure may develop with cardiomegaly, peri- cardial and pleural effusion, ascites and polyhydramnios also seen during pregnancy. This anomaly has high mortality for pump twin and is always lethal for recipient. Here, a TRAP sequence case diagnosed at 14 weeks of gestation in antenatal period and followed up spontaneously until labor, with the demand of the family is presented