How effective is fertility preservation for breast cancer?

Breast cancer treatment may affect fertility in different ways. Some chemotherapy medicines can reduce the number or function of eggs, while hormone treatment may delay attempts to conceive. Surgery and radiotherapy affect fertility differently depending on the area treated. Preservation works by storing eggs or embryos before treatment, or by using another specialist approach suited to your situation.

The outcome depends on factors such as your age, ovarian reserve, the treatment plan, how quickly treatment must begin, and whether you have a partner or sperm source for embryo creation. The number and quality of eggs available can change over time. A fertility specialist can explain what the chosen method can and cannot offer, including the possibility that more than one step may be needed.

Ask for a fertility referral as soon as breast cancer treatment is being planned. The oncology and fertility teams can coordinate testing, stimulation, egg collection, embryo creation or freezing, and the safest timing around cancer care. Do not postpone urgent cancer treatment while arranging preservation without a joint decision from your oncology team.

Bring your treatment plan, medical history, menstrual history, and any previous fertility results. Ask whether hormone-sensitive breast cancer changes the preservation approach, whether medication can be adjusted, and when stored eggs or embryos might be considered after treatment.

Contact your oncology team promptly if you have been diagnosed with breast cancer and want children in the future, even if treatment has not started. Seek urgent medical advice for heavy bleeding, severe pelvic or abdominal pain, breathing difficulty, chest pain, fever, or sudden swelling during fertility medication or after a procedure.

Ask: Which treatment in my plan could affect fertility? How much time is medically safe for preservation? Which option fits my ovarian reserve and cancer type? What side effects should I watch for? When could pregnancy be considered, and who will coordinate follow-up?