Abstract
The prevalence of perinatal problems in a sample of 1037 children was described. There was no significant association between perinatal problems and socio-economic status. The association between perinatal problems and cognitive development was examined by stepwise regression analyses of the more common perinatal problems on cognitive factor scores, using measures of language and intelligence taken when the children were aged 3, 5, and 7 years. Of 14 perinatal problems analysed in this manner, only two, being a twin or being small for gestational age, were found to be consistently associated with a significantly lower cognitive factor score.