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[The incidence of congenital developmental defects among the newborn infants of Rivne Province].

A study was made of frequency of developmental defects among newborn babies in Rivne Province and two its regions (the northern territories relatively free from contamination and those affected by radioactive contamination) that are under control because of the Chernobyl accident. Variations in the frequency of developmental defects (DD) over the studied period (1985-1997) in the province averaged 153 to 372.8 per 10,000 newborns, i.e., the parameter increased more than 2.4-fold. In the controlled regions it averaged 163 to 401.1 per 10,000 neonates (an increase 2.5 as much). A linear increase in DD prevalence might be related both to effects of adverse environmental factors and improvement in diagnosis and registration of pathological states. Retrospectively, 17 DD forms were registered, which, according to the European Register, were grouped under the heading "old defects", and 16 forms placed in the category "new defects". Comparison of DD prevalence with data of the European Register showed that, on the whole, prevalence of some DD among neonates in Rivne Province over the stated period (1985-1997) corresponds to analogous indices in other regions of Europe.