[Complicated pregnancy course following mitral valve replacement].

A report is made on a woman patient with a Björk-Shiley prosthesis in the mitral position, whose pregnancy was complicated by bacteraemia and a thrombotic obstruction of the artificial heart valve. With reference to research, the authors discuss the question of anticoagulation in pregnant women with artificial heart valves as well as the question of the choice of prosthesis in women wishing to have children.