The effect of intrauterine fetal death of one of the twin chorionic fetuses on the mother and fetus and clinical management [Expert opinion or recommendation] Twin chorionic fetuses are usually not affected by the death of one of the fetuses due to the absence of anastomotic vessels between the placentas. The risk of simultaneous death of the surviving fetus is 4%, the risk of neurological sequelae is 1%, and the predominant risk is preterm delivery. If the surviving fetus does not have high-risk factors or is far from full term gestational age, expectant observation is usually chosen with a good outcome. 2. Monthly monitoring of maternal coagulation after intrauterine death of one of the twins: note changes in D dimer and Fib and be alert for the development of chronic DIC.