C0268 Higher risk of idiopathic small for gestational age newborns in Italian women carrying the annexin A5 M2 haplotype

in women treated with low molecular weight heparin (LMWH) for current or previous VTE. We compared them to healthy pregnant women without history of VTE. Methods: We included 56 women with acute VTE treated with 200 IU/kg body weight of LMWH, administered by subcutaneous injection once daily (20 in first, 22 in second trimester of pregnancy), 79women treated with 5000 IU/day of LMWHdue to previous VTE and 28 healthy pregnant women without therapy. Blood samples were collected in 12th, 24th and 32ndweek of gestation and at least 6 weeks after childbirth to obtain the baseline values. Results: