HELLP syndrome (hemolysis, elevated liver enzimes, low platelets count) is one of the major complications of the progression of thrombotic microangiopathies characterized by thrombocytopenia, hemolistic anemia and organic dysfunction. It can be found in between 0,5 - 0,9 % of all pregnancies, and between 4- 14 % in all those women who develop preeclampsia. The general objectives of this report were to describe the relationship existing between the platelet levls and the organic endothelial dysfunction because of the HELLP syndrome, and to determine the perinatal results, during the 10 yr. period of the study, in patients that were assited between 2007 and 2016.