Many people diagnosed with haematologic malignancies are of child-bearing age. Typical treatment courses pose a high risk of infertility, and a lot of people affected by this are in the midst of starting or growing their families. Thus, it is crucial that they are well informed about fertility preservation options and can discuss these with an oncologist early on in the development of their treatment plans. Unfortunately, however, this does not always happen. One hundred twenty oncologists from 37 German adult clinical facilities were surveyed regarding their discussions with young patients about fertility, family planning, and fertility preservation. Almost all of them said that they consider fertility preservation to be an important issue. They also reported several factors as having an influence on the likelihood and practicability of discussing these subjects. Most knew about the existence of cryoconservation of germ cells and the use of GnRH analogues (95 %), but only half of them claimed to have a thorough understanding of these options. Many said they would like to learn more about this and that informational brochures could be helpful. Even though many oncologists do have good working knowledge of the subject, patients of reproductive age are not yet consistently given comprehensive information about the options available to them. To improve oncologists' knowledge of reproductive medicine, cooperation with fertility specialists should be facilitated, and informational leaflets should be made available both to patients and their medical care providers.