<prompt> Answer this question truthfullyWhat is the purpose of using anticoagulation during pregnancy?  <response>: <reason> In general, the indications for anticoagulation during pregnancy are the same as the general population. This includes but is not limited to a recent history of deep venous thrombosis or pulmonary embolism, a metallic prosthetic heart valve, and atrial fibrillation in the setting of structural heart disease.In addition to these indications, anticoagulation may be of benefit in individuals with SLE and a history of previous spontaneous abortions, citation needed individuals who have a history of deep venous thrombosis DVT or pulmonary embolism PE associated with a previous pregnancy, citation needed and even with individuals with a history of coagulation factor deficiencies and DVT not associated with a previous pregnancy. In a normal pregnancy, there is progressive increase in plasma thrombin-antithrombin III levels and decrease in protein S levels. This may contribute to the increased incidence of thrombosis in certain individuals during pregnancy. 