In one more general study, it was found presence of 52% in pregnancy with preeclampsia, IUGR, placental abruption and stillbirth and they were heterozygous for Factor V Leiden, prothrombin gen mutation or homozygous for MTHFR gene mutation, as compared with 17% total of controls [11-13]. The gene discussed is MTHFR; the disease is preeclampsia.