Other determined etiologies were dissection of the cervical or intracranial artery in 40.7% of cases, HELLP complicated by DIC in 11.1% cases, Factor V Leiden mutation, and anti-phospholipid syndrome in 11.1% of cases each, and hyperstimulation syndrome in 7.4% of cases. This evidence concerns the gene F5 and antiphospholipid syndrome.