[Prevalence at birth of more than 30 congenital disorders in Northern Netherlands].

For birth years 1981-1986, 1251 children/foetuses with congenital anomalies were reported to the regional EUROCAT registration of the northern Netherlands (2.5% of all live and stillbirths). In this article the total birth prevalence for over 30 individual congenital anomalies is presented for the first time in the Netherlands. The prevalence registered for neural tube defects is higher than in EUROCAT-centres elsewhere in continental Europe. The prevalence of cleft lip with or without cleft palate is, as in Denmark, higher than in other EUROCAT-centres.