Aetiological monitor of congenital abnormalities: a case-control surveillance system.

An Aetiological Monitor of Congenital Abnormalities was launched in Hungary on 1 January 1980 with the purpose to obtain aetiological information parallel with the reporting of congenital abnormalities. A questionnaire is sent to all mothers having babies with well defined major congenital abnormalities within one month after being reported to the Register. Diseases during pregnancy, drugs taken during pregnancy as well as employment and type of work made by the pregnant are studied.

Classification and registration of multiple congenital abnormalities.

The data processing of multiple congenital abnormalities is demonstrated in the Hungarian Surveillance of Congenital Anomalies. Specified dysmorphic syndromes and CA-associations are registered on the basis of notification. Unspecified multiple congenital abnormalities are evaluated on the basis of notified abnormalities.