Fertility preservation for cancer patients means taking steps to protect eggs, sperm, embryos, or reproductive tissue before cancer treatment may affect the ability to have biological children later. Options include freezing eggs, embryos, or sperm, and in some cases freezing ovarian tissue or moving the ovaries away from radiation. The right option depends on age, puberty, cancer, treatment plan, timing, and personal preferences.
Why might cancer treatment affect fertility?
Cancer and its treatment can affect the reproductive system in different ways. Chemotherapy may damage cells involved in producing eggs or sperm. Radiation directed at or near reproductive organs may affect reproductive cells, hormone production, or the ability to carry a pregnancy. Some cancer surgeries remove reproductive organs, while certain hormone treatments and stem cell transplant regimens may also affect fertility. These effects can be temporary or permanent, depending on the treatment and the person's circumstances.
The National Cancer Institute explains that fertility risks depend on factors such as the type and dose of treatment, the area being treated, age at the time of treatment, and fertility before cancer therapy. For example, treatment that affects the ovaries may reduce the number of eggs available, while treatment affecting the testes may damage sperm-producing cells. Some treatments may also affect the uterus or the hormones that regulate reproduction. Understanding these risks helps the care team identify which preservation methods may be appropriate.
When should cancer patients consider fertility preservation?
Fertility preservation should ideally be discussed before cancer treatment begins. Some procedures require time for testing, medication, tissue collection, or laboratory preparation. Planning early may allow a person to consider more options before treatment affects reproductive function. The American Society of Clinical Oncology recommends discussing the possible effects of cancer treatment on fertility as early as possible and referring interested or uncertain patients to reproductive specialists.
A useful first step is to ask the oncologist how the proposed treatment could affect future fertility and whether a referral to a fertility specialist is appropriate. The specialists can coordinate their recommendations with the cancer treatment schedule. Some cancers require treatment to begin urgently, so fertility preservation must not delay necessary cancer care without agreement from the oncology team. In certain situations, a method that can be arranged quickly may be more suitable than one requiring a longer preparation period.
It is also reasonable to discuss fertility preservation when future plans are uncertain. A person does not need to have a partner or have decided whether to become a parent to ask about the available options. Fertility goals may change over time, and receiving information early can help people make decisions that fit their preferences and medical needs.
Which fertility preservation methods are available?
The available methods depend on the reproductive organs a person has, whether puberty has begun, the type of cancer, and the planned treatment. Some approaches store eggs, sperm, or embryos for possible future use. Others involve freezing reproductive tissue or changing the position of an organ to reduce its exposure to radiation. No single method is suitable for everyone, and preservation does not guarantee a future pregnancy or birth.
Egg freezing and embryo freezing
Egg freezing, also called oocyte cryopreservation, involves collecting mature eggs from the ovaries and freezing them without fertilization. The process generally involves fertility medicines to help eggs mature, followed by a procedure to retrieve them. Later, the stored eggs can be thawed and fertilized with sperm in a laboratory, usually as part of in vitro fertilization (IVF).
Embryo freezing involves collecting eggs, fertilizing them with sperm in a laboratory, and freezing the resulting embryos for possible future use. The American Cancer Society describes both egg and embryo freezing as options for people whose cancer treatment may affect fertility. Egg freezing may suit someone who does not want to use sperm at present or does not want to make decisions about embryos now. Embryo freezing involves fertilization before storage. The choice depends on medical factors, personal preferences, and any relevant legal or ethical considerations.
Ovarian tissue freezing
Ovarian tissue cryopreservation involves surgically removing some ovarian tissue that contains immature eggs and freezing it for possible future use. After cancer treatment, the stored tissue may be thawed and transplanted back into the body when appropriate. It may be considered when there is not enough time for egg collection or when egg freezing is not suitable. This option can also be considered for children who have not yet reached puberty because they do not yet produce mature eggs that can be collected for freezing.
Ovarian tissue freezing is not appropriate for every patient. A fertility specialist and oncology team must consider the cancer type, the proposed treatment, the patient's medical circumstances, and whether the tissue can be safely used later. The possibility of restoring ovarian function or achieving pregnancy varies, so the expected benefits and limitations should be discussed before the procedure.
Ovarian repositioning before radiation therapy
Ovarian transposition, sometimes called oophoropexy, is a surgical procedure that moves the ovaries away from an area that will receive radiation. It may be considered when pelvic radiation is planned and the ovaries can be moved to a safer position. The procedure is intended to reduce radiation exposure to the ovaries, but it does not eliminate every possible effect of treatment on fertility. Its suitability depends on the planned radiation field and other clinical factors.
Medicines that suppress ovarian activity
Medicines known as gonadotropin-releasing hormone agonists may be used in selected circumstances to suppress ovarian activity. They are sometimes given to people receiving treatment for breast cancer. According to the American Society of Clinical Oncology's updated guidance, these medicines should not replace established fertility preservation methods when those methods are appropriate, although they may have a role alongside other care in selected patients. The oncology team can explain whether this approach is relevant to a particular treatment plan.
Sperm freezing and banking
Sperm cryopreservation, commonly called sperm banking, is an established option for people who produce sperm and have reached puberty. A semen sample is collected, assessed by a laboratory, and frozen for possible future use. Depending on the sample and the circumstances, stored sperm may later be used in assisted reproductive procedures, including IVF. Banking sperm before cancer treatment is generally preferred when treatment could affect sperm production or quality.
The National Cancer Institute identifies sperm banking as the most common fertility preservation method for males who have gone through puberty. If someone cannot provide a semen sample or does not have sperm in the semen, a specialist may discuss whether sperm retrieval procedures are appropriate. The feasibility of any method depends on the individual's health and how soon cancer treatment needs to start.
What options are available for children and teenagers?
Fertility preservation options for children and teenagers depend strongly on whether puberty has begun. After puberty, some young people may be able to freeze eggs, embryos, or sperm, depending on their circumstances. Before puberty, mature eggs or sperm are not yet available for collection, so different approaches may be needed.
The American Cancer Society explains that ovarian tissue freezing is an established option for selected girls who have not reached puberty and face a substantial risk of future fertility problems. By contrast, freezing testicular tissue in boys who have not gone through puberty remains experimental and should be offered only through a clinical trial. Not every child needs fertility preservation, so the oncology team should assess the risks associated with the specific cancer treatment. Children and teenagers who are old enough to understand the decision should be included in age-appropriate discussions about their preferences and the proposed procedure.
What should patients consider before choosing a method?
Choosing a preservation method involves balancing the potential benefits with the time, procedures, costs, and limitations involved. Before making a decision, patients can ask their cancer care team and fertility specialist to explain:
- How likely the planned cancer treatment is to affect fertility and whether those effects may be temporary or permanent.
- Which preservation methods are medically appropriate and how much time each option requires.
- Whether a procedure could affect the cancer treatment schedule or needs to be coordinated with planned surgery, chemotherapy, or radiation.
- What is known about the likelihood of future use and success with each method, including any important limitations.
- What the initial procedure, freezing, storage, and later use may cost, and whether insurance or financial assistance is available.
Costs can include the procedure itself as well as ongoing storage fees, and coverage varies by location and insurance plan. Asking about the full cost early may help patients understand the practical options available to them. A hospital social worker, patient navigator, or fertility clinic may be able to explain local services and financial support.
Can fertility preservation still be considered after cancer treatment?
Yes. Although some methods are most useful before treatment begins, a conversation about fertility can still be valuable after treatment. People who did not preserve eggs, sperm, embryos, or tissue beforehand may have other options, depending on their reproductive function, treatment history, and future goals. Someone who already stored reproductive material may also need advice about when and how it could be used.
Fertility and family-building plans should be revisited during follow-up care, particularly if treatment plans change or pregnancy is being considered. The oncology team and fertility specialist can review the person's current situation and explain what is known about reproductive health after treatment. Patients should ask their care team for individualized advice before trying to conceive, because the timing and safety of pregnancy can depend on the cancer, treatment received, and overall health.
What fertility preservation can—and cannot—do
Fertility preservation can protect reproductive material or reduce certain treatment-related risks, but it cannot guarantee that a person will have a biological child in the future. The outcome depends on factors such as age at the time of egg collection, the number and quality of eggs or sperm stored, the preservation method, and health at the time of future treatment. Some people may conceive without using stored material after cancer treatment, while others may need fertility treatment or consider other ways of building a family.
The goal is to provide information and preserve choices where possible without compromising effective cancer care. A timely discussion with the oncology team and a reproductive specialist allows patients and families to understand their options, weigh the likely benefits and limitations, and make decisions that align with their wishes.