Fertility problems in the renal transplant patient.

Renal function, and pituitary and testicular hormone levels were correlated with spermatogenesis in 7 male patients who had undergone successful kidney transplantations. Functions of the pituitary-Leydig cell axis were not impaired. However, abnormal renal function had a direct adverse affect on spermatogenesis. Mechanisms causing infertility in post-transplant patients are reviewed.