Longer distance between umbilical cord insertions is associated with spontaneous twin anemia polycythemia sequence

Abstract

Introduction: The aim of the study was to investigate the placental characteristics in spontaneous twin anemia polycythemia sequence. Material and methods: A retrospective case-control study of spontaneous twin anemia polycythemia sequence, twin-to-twin transfusion syndrome and normal monochorionic diamniotic twin pregnancies was performed. The primary outcome was placental characteristics. Results: The prevalence of artery-artery anastomoses in spontaneous twin anemia polycythemia sequence and twin-to-twin transfusion syndrome groups was significantly lower than in the normal monochorionic diamniotic twin group (40.0% vs 33.3% vs 88.8%, respectively, P