Renal elimination of hormones and peptides. By using a human transplantation model the investigators will study changes in hormonal levels before and after a successful transplantation up to 12 months. Hormones: testosterone, SHBG (sex hormone binding globulin), LH (luteinizing hormone), FSH (follicle stimulating hormone), estradiol and inhibin B.
Analysis of sperm quality, concentration, motility, morphology and as well DNA-fragmentation index (DFI) in men with chronic kidney disease. In women the investigators will study the maturation of follicles via vaginal ultrasound. Controls are persons from a study at Dept of Reproductive Medicine.