(European Society for Medical Oncology) Men with early stage testicular cancer can safely receive one course of chemotherapy or radiotherapy after surgery without it having a long-term effect on their sperm count, according to a study published in Annals of Oncology. Until now, this has not been clear, although it is known already that several rounds of chemotherapy or high doses of radiotherapy given to men with more advanced testicular cancer can reduce sperm count and concentration.