The aim of the present study is to confirm that being born SGA is a serious risk for a negative neurocognitive development. 233 cases have been controlled yearly and longitudinally by the same investigator, some of them 11 times, showing 25,8 % an IQ less than 2 SD, being less affected the catch-up + group (15 %), compared to the catch-up - group (31,4 %). The GH therapy (n 64) started before the age of 6 (n 38) or after 6 (n 26), doesn't improve the negative outcome.