Feto-Endoscopic Tracheal Occlusion (FETO) for Severe Congenital Diaphragmatic Hernia

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