Parents of children with AS can typically trace differences in their children's development to as early as 30 months of age, although diagnosis is not made on average until the age of 11.
Orangtua dari anak-anak dengan SA dapat menelusuri perbedaan-perbedaan perkembangan anak-anaknya sejak usia 30 bulan, meskipun diagnosis baru ditegakkan pada usia rata-rata 11 tahun.