MELINDA ILDIKO MITRANOVICI, LUCIAN PUSCASIU, MARIUS CRAINA, DANIELA IACOB, VERONICA DANIELA CHIRIAC, IOANA IONITA, RADU DUMITRU MOLERIU, GHEORGHE FURAU, ALINA SISU, IZABELLA PETRE THE ROLE OF LOW MOLECULAR WEIGHT HEPARIN IN PREGNANCIES OF PATIENTS WITH INHERITED THROMBOPHILIA THAT HAVE PRESENTED (AND) THROMBOTIC COMPLICATIONS DURING PREVIOUS PREGNANCIES What is presently known is that thromboembolic disease represents a major cause of morbidity and mortality during pregnancy. To this we add a rare but not negligible pathology, acquired and inherited thrombophilia, which increases the predisposition for thrombotic events during pregnancy. In this article, what has been studied is the impact that LMWH has on patients with inherited thrombophilia, both the conventional FV, FII and the newly introduced MTHFR, PAI, FXII, factors which are often combined.81 patients have been taken into consideration / included in study, with the following anterior results, before the patients discovered their illnesses, thus before following treatment: first trimester or advanced pregnancy loss, IUGR, premature birth or secondary placental thrombotic complications such as: preeclampsia, DPPNI or dead fetuses, as well as maternal thrombotic accidents. The administration of LMWH decreased the rate of pregnancy loss compared to untreated pregnancies is statistical significant (p= 0.004), there were fewer DPPNI (p= 0.006), and no intrauterine deaths. We also compared the occurrence of thrombotic events during treated and untreated pregnancies and we observed significant differences in this groups (p= 0.001). There was also a sufficient number of patients with new types of thrombophilia included in the study to demonstrate the impact it has on pregnancy. LMWH improves the situation of women with thrombophilia during pregnancy.