[Results of a follow up study of small for date babies. II. Mental development (author's transl)].

The second part of the follow-up investigation of 74 small for date babies presents the results of neurological investigation and psychological testing. A correlation was found between the period of the intrauterine noxa and the results. A third of the children in group I (where the intrauterine influences were more severe and more prolonged) had an IQ below average. Minor cerebral damage, poor school performance and mental disturbance were significantly more common than in group II. The EEG-investigation did not contribute additional information. In both groups social factors had an important influence.