Twin-to-Twin Transfusion Syndrome

Raphael C Sun, MD, Marisa E Schwab, MD, Brad Feltis, MD, PhD, Christopher S. Muratore, MD, Alejandra M Casar Berazaluce, MD, MSc

Introduction

Twin-to-twin transfusion syndrome is a condition seen in monochorionic diamniotic gestations, that is, twins with a single placenta but separate amniotic sacs. The monochorionic twins develop an unbalanced transfusion via shared placental vessels.

see also Laser Ablation of Placental Vesselsand Fetal Radio Frequency Ablation

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Last updated: January 14, 2026