In addition, multiple studies have implicated potassium voltage-gated channel subfamily Q member 3 (Kcnq3) channel dysfunction in multiple monogenic neurodevelopmental disorders [18,19], such as benign familial neonatal epilepsy (BFNE) and benign familial infantile epilepsy (BFIE) [20], and so Kcnq3-related developmental disability remains to be defined. This evidence concerns the gene KCNQ3 and benign familial infantile epilepsy.