Fabry's disease (angiokeratoma corporis diffusum universale) is an inborn error of metabolism, which is based on a shortage in the cumulation of glycosphingolipids in endothelial and epithelial cells of glomeruli, vascular endothelia and in ganglion cells with subsequent severe organ damage. Heredity is X-linked recessive. In the submitted paper the authors present a case-history of a family where three men were affected and carriership was confirmed in five women. During the first pregnancy one of them a successful prenatal diagnosis was made from cultivated amniotic fluid cells. Chromosomal examination revealed female sex and the levels of the alpha-galactosidase A were established in cultivated cells. A healthy girl was delivered.