Laser Photocoagulation of Communicating Vessels in Twin-to-Twin Transfusion Syndrome

Inclusion Criteria: * Single placenta (Monochorionic) * Polyhydramnios present in recipient twin (Greater than 8 cm maximum vertical pocket below 20 weeks and greater than a 10 cm pocket for greater than 20 weeks gestational age) * Oligohydramnios present in donor twin (Less than 2 cm maximum vertical pocket) * Prominent bladder in the recipient/ non-filling bladder in the donor * Thin dividing membrane Exclusion Criteria: * Patients unwilling to participate in the study or to be followed up * Presence of major congenital anomalies incompatible with survival * Active pre-term labor Ruptured membranes * Chorioamnionitis * Vaginal bleeding