RBFOX3 and Dravet syndrome: Studies in fetuses with DS show that at GW17–GW21, in the DG, hippocampus, presubiculum, entorhinal cortex, subiculum, inferior temporal gyrus, and fusiform gyrus (i) the majority of cells (∼75–95%) are neurons (NeuN+ cells), which is fully consistent with the delayed timing of gliogenesis in comparison with neurogenesis and, (ii) in DS fetuses the missing population is represented by neurons but not by astrocytes (Guidi et al., 2008, 2018; Stagni et al., 2019a).