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Mesh display (with accompanying color scale) of shape index for unmyelinated white matter in fetus with open spina bifida (OSB) (d–f), fetus with OSB and partial agenesis of corpus callosum (g–i), fetus with OSB and severe ventriculomegaly (j–l) and gestational age‐matched control (a–c), assessed before fetal surgery (a,d,g,j), approximately 1 week after fetal surgery (b,e,h,k) and approximately 6 weeks after fetal surgery (c,f,i,l).
