The authors analyze clinical material and autopsy findings of fetuses and children dying at the age from 0 to 15 years during the last 15 years. For etiological evaluation of developmental congenital malformations the authors analyzed anamnesis, genealogy, dermatoglyphics, table materials, biochemical examination, karyotyping. The most frequent organs involved were the central nervous system, cardiovascular system, gastrointestinal tract and to a lesser degree--the genitourinary, osseous and respiratory systems. Congenital developmental malformations were registered in 10.2% of cases: in the prenatal period from 13.1 to 16.2% at different age. Among the children who died with developmental congenital malformations most were in the first year of their life.