Thrombophilia and fetal growth restriction

Objective: Genetic thrombophilia may represent a new risk factor for obstetrical complications. The aim of the study was to determine which Subgroups may be associated with genetic thrombophilia for small for gestational age infants (SGA). Methods: A case-control Study was performed in three different maternity wards in Normandy. Cases (n = 203) were women who had pregnancies complicated by unexplained SGA infants defined as a birth weight below the 3rd centile and control subjects (n = 203) were women who had infants with birth weight greater than or equal to 10th centile. Patients were tested in the immediate postpartum period and 2 months later for factor V Leiden mutation, and prothrombin 20210A mutation. Frequencies of these mutations were observed in different subgroups of SGA infants depending on pregnancy or neonatal Outcomes usually associated with intrauterine growth restriction (IUGR), and were then compared with the overall prevalence for these Mutations detected in the control group. Results: Prevalences for factor V Leiden mutation (OR = 2.58; 95% confidence interval: 0.83-8.04), prothrombin 2021OA mutation (OR = 2.03; 95% confidence interval: 0.5 1-8.01), were comparable between cases and controls (4.9% versus 1.9% and 2.9% versus 1.4%. respectively). Frequencies for these two polymorphisms significantly increased in subgroups of SGA infants with a normal Pourcelot index (13/133 versus 7/203; P = 0.04), a gestational age greater than or equal to37 weeks of gestation (151143 versus 7/203 P = 0.01), a vaginal delivery (11/117 versus 7/203: P = 0.04), a birth weight greater than or equal to2000 g (12/121 versus 7/203; P = 0.03), no admission to paediatric ward (11/116 versus 7/203 P = 0.01). a low Ponderal index <2.5(e) centile (6/45 versus 7/203; P = 0.04), and normal head circumference >10th centile (7/53 versus 7/203; P = 0.01) in comparison with the control group. Conclusions: An association was found between polymorphistris for factor V Leiden and prothrombin. and asymmetrical intrauterine growth restriction with immediate favourable neonatal Outcomes. (C) 2003 Published by Elsevier Ireland Ltd.