In conclusion,we observed a significant increase in obstetric acute renal failure in canada that was restricted to women with hypertensive disorders if pregnancy and was particularly evident among those with gestational hypertension with significant proteinuria.Further studies are required to confirm our findings, including those related to temporal trends in pulmonary oedema,and to determine the specific aspect of pre-eclampsia management that may be increasing the risk of pregnancy related kidney injury,in addition, the long term impact of pregnancy related kidney injury requires further study.Clinicians managing women with pre-eclampsia should carefully monitor them for signs of impending renal failure and take appropriate steps to mitigate the risk of further kidney injury.