Significant progress in oncology over the past years resulted in a noticeable improvement of mean survival rates of patients treated for malignant tumors. Particularly rewarding is the treatment of tumors in the pediatric and juvenile age group. A sizeable proportion of patients subjected to oncologic treatment, i.e. chemotherapy, radiotherapy and surgery, experience a limited procreative potential as a sequel of administered therapy. Among chemotherapeutics, some of the most toxic compounds are alkylating agents, e.g. cyclophosphamide, chlorambucil, melphalan and procarbazine. Severity of negative effects of cytostatics on the patients’ fertility depends largely on administered dose and patient’s age at the time of treatment. In the case of radiotherapy, severity of limitation of procreative potential correlates with total absorbed dose of radiation, irradiated body area and, as in the case of chemotherapy, on the patient’s age. Induced iatrogenic infertility is a tremendous problem for survivors, adversely affecting their quality of life. Apart of inherited genetic syndromes, no evidence is available suggesting that oncologic treatment instituted in the past in the parents might increase the risk of cancer or congenital malformations in their offspring. Thanks to the development of novel procreation-enhancing techniques, several options are currently available enabling preservation of procreative potential of oncologic patients. Prior to institution of antitumor therapy, persons who wish to preserve fertility should be offered cryopreservation of embryos, oocytes, sperm or of a sample of gonadal tissue, transposition of ovaries or hormonal suppression of oogenesis and spermatogenesis. Implementation of these techniques should provide young people with a chance to raise their own children.