Patients with multiple pregnancies have an increased risk of preterm labor and delivery with the associated high prenatal morbidity and mortality. Obviously, as the number of multifetal pregnancies increases (due primarily to the use of assisted reproductive treatments), a rise in the unexpected birth of one or more siblings at premature or previable stages is observed. In multiple pregnancies with imminent preterm birth, delayed delivery may offer survival chances and a favorable outcome for the remaining fetus(es). Herein, we report on the prolongation of a triplet pregnancy and survival of fetuses B and C after loss of fetus A at 21 weeks' gestation. Copyright (C) 2002 S. Karger AG, Basel.