Three main methods of prenatal diagnosis (Amniocentesis AMC, Chorionic villi sampling CVS and Cordocentesis FBS) have been used in Perinatal Centre of Central Bohemia. The chromosomal abnormalities in a group of 3,098 patients have been detected in 1.4% of fetuses. The inherited disorders were diagnosed using DNA analysis and biochemical examination of amniotic fluid. X-linked diseases in a group of 68 patients in 30.8% of fetuses have been diagnosed and inborn error of metabolism in a group of 29 indicated patients in 17.2% of fetuses were diagnosed. The incidence of fetal losses before 28th week of gestation was 0.4%.