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Pregnancy in women known to be living with a single kidney

There is a paucity of data on pregnancy outcome in women living with a single kidney from all causes. Current thinking is extrapolated from living kidney donors, a group biased by strict selection criteria. We present a cohort of 26 women with a solitary functioning kidney; 11 women had an acquired single kidney of whom only 1 was a living donor and 15 had a congenital single kidney. Median time living with a single kidney was 28 years. None booked with hypertension or proteinuria. Urinary tract infection complicated 50% of pregnancies. Worryingly, 35% developed pre-eclampsia, gestational proteinuria or gestational hypertension. We propose pre-conceptual counselling, education on how to protect their single kidney, pre eclampsia prophylaxis with low-dose aspirin and close monitoring for urinary tract infection, hypertension and proteinuria with lower thresholds for pharmaceutical management. We have devised a Patient Information leaflet – ‘Living with a single kidney, pregnancy and beyond’.