The authors describe their experience in the follow-up of four patients with chronic renal failure who became pregnant while being treated with chronic hemodialysis. The outcomes were successful and each gave birth to healthy babies. The adequate nutritional condition previous to the pregnancies added more safety to their management. Special dedication to the nutritional control enabled a good outcome of their pregnancies. It stressed the importance of the intervention of the nutritionist-dietitian in the follow-up of nephrologic patients and the integration of a multidisciplinary staff.