A case report of the pregnancy complicated by the presence of vein of Galen aneurysmal malformation in fetus.The case report.Department of Obstetrics and Gynaecology, Masaryks Hospital, Jilemnice; Obstetrics and Gynecology Clinic, University Hospital in Hradec Králové.The description of the pregnancy complicated by the presence of vein of Galen aneurysmal malformation in a fetus 32 weeks gestation which led to a progressive heart failure and the development of the hydrocephalus.The vein of Galen aneurysmal malformation is a rare cerebrovascular malformation of the fetus, the diagnosis of this malformation is usually detectable during prenatal ultrasound examination possibly also by magnetic resonance imaging.