CU Cancer Center

Cancer and Fertility: What Men Need to Know

Written by Greg Glasgow | June 04, 2026

Cancer and its treatment can cause a host of physical and mental health concerns, but for men, there is another issue to take into consideration: fertility.

Because cancer, as well as treatments such as chemotherapy, surgery, and radiation, can affect sperm count and other aspects of fertility, oncologists often recommend sperm banking — freezing sperm for future use — before treatment begins.

We spoke with University of Colorado Anschutz Cancer Center member Jeff Morrison, MD, assistant professor of urology in the CU Anschutz Department of Surgery, to learn more about how cancer affects male fertility and what doctors can do to help.