Impact of pregnancy on the outcome of kidney transplantation

Background. There is still controversy over whether pregnancy adversely affects renal transplantation outcomes. We, thus, compared two groups of kidney transplant recipients in terms of patient survival and allograft function: those who did versus did not conceive posttransplant. Methods. This historical cohort study conducted between 1996 and 2002, divided female kidney transplant recipients of reproductive age into group I (n = 86, at least one posttransplant pregnancy) and group II (n = 125, no posttransplant pregnancy). The two groups were matched for age, cause of end-stage renal disease (ESRD), treatment protocol, and first creatinine (0). All patients received a first transplant and all had a Cr less than 1.5 mg/dL on entry into the study. The subjects were followed for 45.4 +/- 22.0 and 46.3 +/- 19.8 months, respectively (P > .05). Five-year patient and graft survivals and Cr were considered to be the main outcome measures. Results. Mean (SD) age in groups : I and II was 26.6 +/- 6.6 and 26.9 +/- 8.1 years, respectively (P > .05). Five-year patient and graft survival rates were not significantly different between the study groups. Of the women in group 1, only 9 (10.5%) subjects displayed elevated serum Cr levels (> 1.5 mg/dL) at the end of follow-up, while the serum Cr levels in 35 (28%) group II patients were above 1.5 mg/dL (P =.024). Conclusion. Our results indicates pregnancy did not seem to adversely affect patient and graft survival among kidney transplant recipients. Renal transplantation in stable women of childbearing age should not be a contraindication to pregnancy.