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The choice and regimen of anticoagulation therapy in pregnant women with mechanical valve prostheses have always been a daunting task. It is a delicate balance that takes into consideration the risk of thromboembolic complications in the mother and the risk of potential Warfarin embryopathy to the foetus. Medical practice in a low socioeconomic setting also has the peculiar challenge of financial constraints on the part of the patients and difficulties in monitoring the efficacy of anticoagulation therapy. We report our experience in managing two pregnant women with mechanical valve prostheses and review the existing literature on this complex but interesting subject. [ABSTRACT FROM AUTHOR]