[Frequency and layout of congenital defects in infants born from 1991 to 1995 and from 2000 to 2004 at the Obstetrics and Gynecology Department of Wolomin District Hospital].

Objective: The aim of the study was an evaluation of the frequency and distribution of congenital malformations in infants born at the Obstetrics and Gynecology Department of Wołomin District Hospital in the years 1991-95 and 2000-2004 and a comparison of occurrence frequency of defects' types in the analyzed periods.

Methods: The study comprises an evaluation of documentations of 5649 infants born in the years 1991-1995 and 6049 infants born in the years 200-2004, 11698 infants in total. In the study groups of infants, the frequency of congenital malformation occurrence was analyzed.

Results: The majority of congenital malformation diagnosis in the years 1991-1995 were CNS defects with 21% and the second most frequent group were facial skeleton defects with 16% The majority of congenital malformation diagnosis in the years 2000-2004 were osteoarticular system defects (25%) and the second most frequent group were organic heart diseases with 14%.

Conclusions: The frequency and distribution of congenital defects was comparable with data provided by other authors. The most frequent defects were osteoarticular system defects, congenital hart dsefects and CNS. An increase in number of defects of the osteoarticular system was observed.