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