Objective: This study aims to investigate the status of fertility preservation (FP) in young breast cancer patients. Materials and methods: A clinical database of six women with breast cancer who wished to undergo FP before starting chemotherapy were analyzed between January 2018 and December 2019 in our hospital. Among the six women, three were unmarried and three were married. Results: Three patients chose oocyte preservation and obtained 23, 7, and 17 MII oocytes, respectively. One patient chose embryo freezing, and three embryos were frozen. Fertility preservation failed for two patients, one of whom had premature ovulation, while the other patient abandoned egg retrieval on the human chorionic gonadotropin (HCG) day. Conclusion: The present results indicate that oocyte and embryo cryopreservation are effective optional methods for young breast cancer patients. However, a lack of knowledge, the urgency of cancer treat-ment, and financial constraints are causes for a low access rate regarding this process. (c) 2021 Taiwan Association of Obstetrics & Gynecology. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).