[Twin pregnancy with single fetal death due to triploidy--a case report].

The incidence of multiple pregnancies is associated with the increased risk in maternal and fetal complications. Intrauterine death of one twin in the second trimester is a rare obstetric complication. Authors report a case of a twin pregnancy with triploidy of one fetus and no chromosomal anomaly of the other twin in a dichorionic diamniotic twin pregnancy. Amniocentesis at 16th weeks disclosed triploidy of this fetus who died afterwards at 20th week of gestation. The pregnancy was continued with special care of the mother and the alive fetus. The second twin was successfully delivered by cesarean section in the 41st week of pregnancy due to the intrauterine fetal distress.