FOXP1 and autism: Previously, variants within the functional domains of the FOXP1 protein have been associated with autism (Carr et al., 2010; Hamdan et al., 2010; Horn, 2011); Pariani, Spencer, Graham, & Rimoin, 2009) and more recently, FOXP1 related ID syndrome (Meerschaut et al., 2018; Siper et al., 2017).