Radiofrequency ablation for selective reduction in complicated monochorionic multiple pregnancies.

OBJECTIVE: To evaluate the perinatal outcome of monochorionic (MC) multiple pregnancies after selective reduction by radiofrequency ablation (RFA). METHODS: A case series of all MC multiple pregnancies with selective reduction by RFA in one single institution was reviewed. RESULTS: Ten consecutive patients with an MC pregnancy (9 pairs of twins and 1 set of triplets) underwent RFA. The median gestational age at the time of the procedure was 15.6 weeks (range, 12.3-19.6). The indications for selective reduction included discordance for fetal anomalies (4 cases), twin reversed arterial perfusion sequence (3 cases), selective intrauterine growth restriction (2 cases) and severe twin-twin transfusion syndrome (1 case). All procedures were technically successful in achieving selective reduction. The overall survival rate of the co-twin was 81.8% (9/11), and the median gestational age at delivery was 35.9 weeks (range, 32.4-38.6). There was one preterm delivery before 34 weeks of gestation (11.1%). Preterm premature rupture of the membranes occurred in 2 patients (20%); however, this was not observed within 4 weeks postoperatively, nor did they deliver before 32 weeks. CONCLUSIONS: RFA is a promising technique for selective reduction in complicated MC multiple pregnancies with a high survival rate and low complication rate.