Every year in Poland, hematologic cancers are diagnosed in about 9,000 people. It is estimated that around 25% of patients with a hematologic cancer diagnosis are of reproductive age at the time of diagnosis. Treatments for oncohematological diseases often involve methods that can impair patients' fertility. In July 2024, Poland introduced reimbursement for fertility preservation procedures for cancer patients. The aim of this study was to gather data on the knowledge and opinions of male patients regarding oncofertility procedures, as well as to understand the psychological factors influencing their decisions to preserve or not preserve their fertility. The data were analyzed in the context of changes over time, especially considering the recent reimbursement introduced last year. The study involved 130 men aged 18-45 from Polish oncohematology treatment centers affiliated with the Polish Adult Leukemia Group. The participants completed a questionnaire designed for this research, which assessed their knowledge, sources of information, and opinions about oncofertility, along with a set of psychological tests describing their psychological functioning (personality traits, levels of anxiety and depression, stress coping strategies, acceptance, and perception of illness). The results revealed a concerningly low number of patients who had been informed about fertility preservation options—just over half of them. Medical staff more frequently inform patients under 30, often overlooking older patients, especially those who already have children at the start of treatment. Based on these findings, educational materials were developed to meet the patients' informational needs, and a proposed scheme for delivering these materials by healthcare professionals was created.