Background: Obstetric complications are the hallmark of antiphospholipid syndrome. Recurrent miscarriage, pre-term birth, oligohydramnios, prematurity, intrauterine growth restriction, pre-eclampsia/eclampsia, thrombosis and placental insufficiency are the most severe complications in patients of bad Obstetric history with elevated anti-phospholipid antibodies. Hence this single-center study was carried out to identify the pregnancy complications and side effects of aspirin alone and aspirin plus low molecular weight heparin (LMWH) in spite of the treatment.