to evaluate the etiology, complications, causes of death, fetal outcome, management strategies and prognosis of the patients with obstetrical acute renal failure. This is a prospective 3 years study at a tertiary care hapital of patient suffering from acute renal failure of obstetrical origin at Department of Nephrology, LRH, peshawar from 1998 to 2000. The patiens were followed up 1 year as an outpatient following hospital discharge. obstetrical acute renal failure has high mortality. its a common cause of morbidity and moratliy. In addition to acute tubular necrosis (ATN) as a leading casue of reversible ARF, cortical necrosis contribute signficantly to the permanent loss of kidney functions and adds to co-morbidity.