A case is presented of a young adult male diagnosed with acute myeloid leukaemia who was treated with busulphan and cyclophosphamide, but not total body irradiation, with subsequent bone marrow transplantation. After surviving for 5 years, he and his wife experienced a period of infertility. Interestingly, the problem was found to be with the female partner and the man's sperm evaluation seemed normal. A successful pregnancy ensued following the surgical removal of a large endometrioma and treating a luteal phase deficiency. Though this may be the fifth case of proven parentage in cases of bone marrow conditioning and bone marrow transplantation in a male for control of leukaemia, we believe it is the first documented case showing a normal semen analysis despite treatment. Further studies are needed to see if chemical conditioning with busulphan and cyclophosphamide preserve the chances of sperm production better than total body irradiation.