Every year, about 20,000 women in the United States are diagnosed with ovarian cancer. Ovarian cancer is the eighth most common cancer and the fifth leading cause of cancer death among U.S. women, but early detection can greatly increase the chances of successful treatment. Researchers at the University of Pennsylvania are training dogs to sniff out samples of ovarian cancer in an effort to increase its early detection and save lives. In this podcast, Dr. Cynthia Otto, director of the Penn Vet Working Dog Center, talks about how dogs are using their amazing sense of smell in an effort to develop better screening tests for ovarian cancer.