In recent decades, the increasing trend of postponing pregnancy to the end years of the reproductive period and the growing number of young women diagnosed with breast cancer (BC) led to some reproductive-aged women with BC intending to experience pregnancy after completing treatment. As the fertility rate in Iran has decreased in recent decades and young BC patients as a reproductive-aged group of women have an essential role in the fertility index, this policy brief is conducted to assess the childbearing recommendations in reproductive-aged women diagnosed with BC. To write this policy brief study, researchers searched international databases such as Google Scholar, Scopus, Web of Sciences, Cochrane Library, and PubMed, and Iranian national databases such as Scientific Information Database and Magiran. In addition, some general international health websites and specific websites were explicitly searched to find the best evidence. The results of this study are presented in three main categories: myths, realities, and considerations of childbearing among BC patients. Overall, there were no comprehensive clinical guidelines or documents for the management of childbearing issues among women with a diagnosis of cancer while in illnesses like cancer, reproductive-aged women, except for high-quality cancer treatment, need multidimensional and multidisciplinary comprehensive supportive care regarding their fertility status to successfully adjust with their treatment. Also, as a political suggestion, physicians and other healthcare providers should update their information to present complete responses to patients’ questions and main concerns regarding childbearing issues and the prognosis of illness after pregnancy.