Approximately 1 in 150 women carry an FMR1 premutation that confers risk for FXS in offspring (Berkenstadt, Ries‐Levavi, Cuckle, Peleg, & Barkai, 2007; Cronister, Teicher, Rohlfs, Donnenfeld, & Hallam, 2008; Toledano‐Alhadef et al., 2001). Here, FMR1 is linked to fragile X syndrome.