Abstract As the prevalence of cancer in young people rises, and with improved survival rates such that over 80% of young cancer patients can expect to recover, future fertility and having their own family has become an important consideration which needs to be addressed. Best-practice oncofertility management includes initial discussion, assessment of fertility risk and medical risk, and consideration of preservation strategies prior to commencement of potentially gonadotoxic therapy, where possible, as well as post cancer-treatment fertility care. The window of opportunity for oocyte cryopreservation and/or ovarian tissue cryopreservation may be very limited. Therefore it is of paramount importance that a patient’s medical condition, gonadotoxicity risk, and current reproductive health and potential are considered when planning fertility preservation. Antimullerian hormone (AMH) is one of a group of tests performed which can assist with planning treatment and with counselling regarding the likely yield of a cycle. Knowledge regarding pre-treatment AMH, along with a patient’s age and the type of cancer treatment, may also assist with counselling regarding the likelihood of recovery of fertility after completion of this treatment. However, there are many factors which affect AMH levels, and it is well-known that the results of stimulation can be very variable, as can be the long-term impact of the potentially gonadotoxic treatment. Hence an AMH test, while useful, needs to be contextualized as being only one of many factors to be considered when planning optimal (in terms of yield and safety) fertility preservation treatment and advising re future fertility.