Objectives: The aim of the pilot study was to determine the incidence of congenital malformation of lives births and infants < 1 year old at three suburban districts: Tuy Phong, Ham Thuan Bac and Ham Thuan Tan of Binh Thuan province for six months (1/9/2005 - 28/2/2006) Method: Cross-sectional study (prevalence study), subject of study was the lives births and infants < 1 year old and their mother.