Fetuses with congenital diaphragmatic hernia with liver-up, and an observed to expected lung-to-head ratio of \<25%, LHR \<1, or a moderate category with o/e LHR \<30%, singleton pregnancy, no known other anomalies, gestational age \< 29 weeks 6 days (severe), gestational age \< 31 weeks 6 days (moderate), no maternal disease, maternal age \> 18 years old…. meet criteria to be offered fetal tracheal occlusion. We want to test feasibility and efficacy in our center.
