Study population
Twenty-eight fetuses had left, 12 right and 2 bilateral CDH (n=42; Table 1). The mean GA at first MRI was 28.0 ± 2.1 weeks (median: 28.0; range: 22.4 – 32.0) and at the second 33.2 ± 1.3 weeks (median: 33.6; range: 29.9 – 35.0). The mean difference between the two measurements was 4.8 ± 1.9 weeks (range: 1.1 – 8.4). FETO was performed in 40 fetuses (95%) with a mean GA at FETO of 29.3 ±1.5 weeks (median: 29.4; range: 26.1-32.7). The mean number of days between FETO and second MRI was 26.45±11.76. Balloon removal was performed at a mean GA of 33.5 ± 1.1 weeks (median: 33.9; range: 30.0 – 34.9). The mean GA in controls was 30.7 weeks ± 4.2 (median: 30.5; range: 20.6 – 37.7). SRR for volumetric analysis was possible in 25 (60%) fetuses at the first time point, and 23 (55%) at the second time point. Further details of success rates for volumetric measurements at the first and second time point and numbers of available measures from paired data are displayed in table S2. In controls, 52 (93%) reconstructions were possible.