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Bogusław Antoszewski, Julia Kruk-Jeromin
Med Sci Monit 1998; 4(3): EP513-517
Over 132.783 newborns (between 1981-1995) have been analyzed to reveal 267 infants with a cleft lip and/or palate which made the mean frequency of clefts at 2 per 1000. Additionally, we defined the forms and sides of clefts, as well as the sex of children with clefts. The comparison of Łódz studies during the period of 1951-65 and 1981-95 indicates a slight increase in the occurence of clefts.