Objective. To assess the relationship between Takayasu arteritis (TAK) and pregnancy outcome.Methods. This study included 240 pregnancies in 96 patients fulfilling the American College of Rheumatology 1990 criteria for the classification of TAK and/or the 1994 Chapel Hill Consensus Conference nomenclature/criteria for vasculitis. We analyzed obstetric and maternal outcomes in women who were pregnant before and/or at the same time as or after TAK diagnosis. We assessed factors associated with complicated pregnancy.Results. Conclusion. TAK negatively affects pregnancy outcomes. Disease activity increases the risk of obstetric and maternal complications, mainly due to arterial hypertension.Takayasu arteritis (TAK) is a chronic inflammatory vasculitis of unknown origin affecting large vessels, predominantly the aorta and its main branches (1). Vessel inflammation leads to wall thickening, fibrosis, stenosis, and thrombus formation. More acute inflammation can severely compromise the arterial media, leading to loss of vessel wall integrity and aneurysm formation. These lesions are often asymptomatic unless they dissect, rupture, or, in the case of the aorta, produce root/arch aneurysms and aortic regurgitation. These lesions are often discovered after many years of disease. Symptoms reflect end-organ ischemia. During TAK, cardiovascular events are not uncommon (2,3). Pregnancy can also lead to vascular injury, and pregnancy-related cardiovascular and cerebrovascular accidents are feared maternal complications. Cardiovascular and cerebrovascular events account for 5-19% of all maternal deaths during pregnancy (4).