What Are Your Fertility Options After Cancer Treatments

After receiving cancer treatments, you or your partner may have some concerns about the ability to have children after recovery. Fortunately, there have been a number of advances in reproductive medicine, which means that there are now a number of options available to people who want to preserve and restore their fertility after cancer treatments. 

In this article, we explore fertility after cancer treatment and the options for having children so you can be more prepared to discuss with your care team. 

Can you have children after cancer treatment?

Some people can conceive naturally after cancer treatment, while others need fertility treatment. For some, treatment causes permanent fertility changes. Your chances of having a child depend on several factors, including:

• Your age at treatment, current age, and fertility before treatment
• The type of cancer and the treatment required
• The chemotherapy drugs and doses used
• The area treated with radiotherapy and the radiation dose, including whether treatment affected reproductive organs or glands that regulate reproductive hormones
• Whether surgery affected the ovaries, uterus, testicles, prostate, or other reproductive structures
• Whether you preserved eggs, sperm, embryos, or reproductive tissue before treatment
• How much time has passed since treatment and whether you are still receiving cancer medicines

Fertility may recover over time, but recovery is not guaranteed. In women, periods may return even when fertility has been reduced, and in men, sperm production may recover only partially or not at all. A fertility assessment can help clarify your options, while your cancer care team can advise when it is appropriate to try for a pregnancy.

How cancer treatment affects fertility

Cancer treatment can affect fertility by damaging reproductive organs, reducing egg or sperm production, or altering reproductive hormones. Some treatments also affect the ability to carry a pregnancy, get an erection, or ejaculate. The effects may be temporary or permanent, depending on the treatment, dose, age, and fertility before treatment.

Chemotherapy

Chemotherapy medicines destroy cancer cells but can also damage healthy reproductive cells.

In women, some medicines damage eggs in the ovaries, reducing the number of remaining eggs. Periods may stop temporarily, or ovarian function may be permanently affected, causing menopause earlier than expected. The return of periods does not necessarily mean fertility is unchanged.

In men, chemotherapy can damage sperm-producing cells in the testicles, reducing or stopping sperm production. Recovery may take months or years and may be incomplete. Some treatments cause permanent infertility. The risk depends on the medicines, doses, and combinations used.

Radiotherapy

Radiotherapy can affect fertility when radiation reaches reproductive organs or areas of the brain that regulate reproductive hormones.

In women, radiation to the ovaries can damage and reduce ovarian function. Radiation to the uterus may affect its muscles and blood supply, making it more difficult to carry a pregnancy and may raise the risk of miscarriage, preterm birth, or a low birth weight.

In men, radiation to the testicles or nearby areas can damage sperm-producing cells. Pelvic radiotherapy may also affect erections or ejaculation by damaging nerves, blood vessels, or reproductive structures.

Radiation to the brain can affect the pituitary gland or hypothalamus, disrupting hormones needed for ovulation, sperm production, and testosterone production. The risk depends on the area treated and the radiation dose.

Surgery

The effects depend on which organs, structures, or nerves are removed or damaged.

In women, removing the uterus means a pregnancy cannot be carried. Removing both ovaries removes the remaining egg supply and causes immediate menopause before natural menopause. Selected fertility-sparing procedures, such as removing the cervix while preserving the uterus, may allow pregnancy to remain possible.

In men, removing both testicles permanently stops sperm production, while one remaining testicle may continue producing sperm. Removing the prostate and seminal vesicles prevents semen ejaculation, although sperm production may continue. Other pelvic operations can affect erections or ejaculation.

Hormone therapy and the treatment interval

Hormone therapy alters hormone levels or blocks their effects. In women, some treatments suppress ovarian function or stop periods, but absent periods do not reliably rule out pregnancy. Long treatment courses may also delay pregnancy while fertility declines with age.

For example, endocrine therapy for hormone receptor-positive breast cancer may continue for 5-10 years. In selected patients, a planned treatment pause to attempt pregnancy may be considered under the oncology team’s supervision.

For example, in men, hormone therapy used to treat prostate cancer can reduce sperm production, lower sex drive, and make it harder to get or maintain an erection. Recovery after treatment varies.

Targeted therapy and immunotherapy

The effects on fertility vary between medicines and are not fully understood. Some may affect ovarian function, sperm production, or reproductive hormones. Pregnancy risks are a separate concern: a medicine may harm a developing pregnancy even when its long-term fertility effects are uncertain. Ask your cancer care team about the risks of your specific medicines.

Stem cell transplant

A stem cell transplant, including a bone marrow transplant, often requires high-dose chemotherapy and sometimes total-body radiotherapy beforehand. These preparatory treatments can cause permanent ovarian damage or early menopause in women and reduce or stop sperm production in men.

Fertility preservation options depend on where you are in your treatment timeline. If you want to understand yours, WhatsApp our Care Team. We'll match you to a fertility specialist who works with cancer patients, arrange the appointment, and coordinate from there.

How your fertility is assessed after treatment

After cancer treatment, a fertility specialist may review your age, menstrual or sexual health history, cancer treatment, and family-building plans. 

Ovarian reserve tests

For women, assessment may include ovarian reserve testing, which helps estimate the remaining egg supply. Cancer treatments may reduce this supply, even if periods return after treatment. These tests do not directly measure egg quality or determine whether natural conception is possible.

Your fertility specialist may use one or more of the following:

Sperm and hormone tests

For men, the main fertility test after cancer treatment is a semen analysis to assess:

• Sperm count: The number of sperm in the sample.
• Motility: How well the sperm moves.
• Morphology: The proportion of sperm with typical shape.

A semen analysis can show whether sperm are present and help guide further assessment and treatment options. However, the results cannot reliably predict conception on their own, and repeat testing may be needed if the first result is abnormal.

Blood tests may also be recommended to check reproductive hormones. These can help identify whether fertility changes may be related to the testicles, the pituitary gland or hormone signalling, particularly after treatments affecting the brain, testicles or hormone-producing organs.

Fertility options after cancer treatment for women

A fertility specialist can review your cancer history, current health, ovarian reserve and pregnancy plans before recommending an approach. The timing should also be discussed with your oncologist, particularly if you are still on cancer treatment or follow-up medication. 

Conceiving naturally after treatment

Some women can conceive naturally after cancer treatment if ovarian function is maintained or recovers. However, returning periods do not necessarily mean fertility is unchanged. 

Your fertility specialist may recommend an ovarian reserve test alongside a wider assessment. The results can help guide fertility treatment planning but cannot reliably predict your chances of natural conception or how long you have left to conceive.

Do not start trying for pregnancy naturally until your oncology team confirms that it is appropriate.

Assisted reproduction using your own eggs

If your ovaries still produce eggs, your fertility specialist may discuss assisted reproduction based on your age, treatment history and fertility assessment. You do not necessarily need to try conceiving naturally first.

• Intrauterine insemination (IUI): Prepared sperm are placed into the uterus around the time of ovulation.
• In vitro fertilisation (IVF): Eggs and sperm are combined in a laboratory to create embryos for transfer into the uterus.

Using previously frozen eggs or embryos

If you froze eggs or embryos before cancer treatment, your fertility specialist can assess whether they can be used. Frozen eggs can be thawed and fertilised to create embryos, while previously frozen embryos can be thawed for transfer into the uterus. Your oncology team should confirm that attempting pregnancy is appropriate.

Donor eggs and donor embryos in Singapore

If your own eggs cannot be used, your specialist may discuss donor eggs. Donor embryos may be considered in some circumstances, but their use is subject to Singapore’s clinical and regulatory requirements.

Altruistic egg donation is allowed in Singapore, although donor availability is limited. Your assisted reproduction centre can explain the eligibility, donor screening, counselling and consent requirements for using donated eggs or embryos. 

Fertility options after cancer treatment for men

After cancer treatment, fertility options for men depend on sperm production, whether treatment affected ejaculation, and whether sperm were stored before treatment.

Conceiving naturally if sperm production returns

Some men regain sperm production after chemotherapy or radiotherapy. If sperm production and ejaculation are adequate, natural conception may be possible. Semen analysis helps assess this but cannot predict conception on its own. This recovery can take months or years, and not everyone regains the same sperm production as before treatment.

Fertility treatment using sperm produced after treatment

If sperm are present but the count or movement is reduced, assisted reproductive treatment may help. The options may include IUI, IVF, or intracytoplasmic sperm injection (ICSI) – a single sperm is injected directly into an egg as part of IVF.

Using previously frozen sperm

If you stored sperm before cancer treatment, it may be thawed and used for IUI or IVF, including ICSI. The appropriate treatment depends on the amount and quality of sperm available and your partner’s fertility assessment.

Surgical sperm retrieval

If no sperm are found in the semen, or a sample cannot be obtained because treatment affected ejaculation, your specialist may assess whether surgical sperm retrieval is appropriate. One method is testicular sperm extraction (TESE), which involves collecting tissue from the testicle to look for sperm.

When sperm are retrieved surgically, they are usually used with IVF and ICSI. It may not be appropriate or successful for everyone, and the likelihood of finding sperm depends on the cancer treatment received and whether sperm-producing cells remain in the testes.

Donor sperm

If sperm production does not recover and surgical retrieval is not successful or suitable, donor sperm may be considered for IUI or IVF. 

In Singapore, the use of donor sperm is subject to eligibility, screening, counselling and consent requirements. Your fertility centre can explain the requirements that apply to your treatment.

If you are newly diagnosed: Preserving fertility before treatment  

If you have been newly diagnosed with cancer and may want to have children in the future, you can discuss fertility preservation with your care team before treatment begins to help consider the suitable options without unnecessarily delaying cancer treatment. 

Freezing eggs or embryos

Egg freezing involves collecting mature eggs from the ovaries and freezing them for possible future use. The eggs are thawed, fertilised with sperm in a laboratory and developed into embryos for transfer to the uterus through IVF.

Embryo freezing follows a similar process, but the eggs are fertilised with a partner’s sperm before they are frozen. 

Both approaches usually require a period of ovarian stimulation before egg collection, so your fertility specialist will work with your oncologist to determine whether there is time to proceed without compromising cancer care.

Freezing ovarian tissue

Ovarian tissue freezing may be considered if cancer treatment needs to begin urgently or for children and adolescents who have not yet reached puberty. 

During the procedure, ovarian tissue containing immature eggs is surgically removed, frozen and stored. After cancer treatment, the tissue may be thawed and transplanted back into the body in selected cases.

Unlike egg or embryo freezing, this approach does not require ovarian stimulation. 

This procedure may not be appropriate for every cancer type, particularly where there is a risk that cancer cells could be present in the ovarian tissue.

Freezing sperm

Sperm freezing, also called sperm banking or sperm cryopreservation, is the established fertility-preservation option for men. You provide one or more semen samples, which are frozen and stored for possible future use.

After cancer treatment, the stored sperm may be used for IUI, IVF, or ICSI.

Preservation options depend on your treatment timeline, so this is worth sorting early. WhatsApp our Care Team, we'll match you to one to three fertility specialists who work with cancer patients, based on your condition, insurance, and preferences, with the reasoning for each. Once you choose, we arrange the appointment and coordinate from there.

When can you try to conceive after cancer treatment?  

The right time to try for pregnancy after cancer treatment is different for everyone. 

For women planning to carry a pregnancy, FIGO generally advises waiting 1 to 2 years after completing cancer treatment or achieving remission before trying to conceive. This allows time for your body to recover and avoids pregnancy during the period when some cancers are more likely to recur. However, this is not a fixed rule.

For some cancers, you may need to wait longer. For example, people with hormone receptor-positive breast cancer may be advised to take hormone therapy for several years. A planned treatment break to try for pregnancy may be possible for selected patients, but this needs careful discussion with the oncology team.

For men, the appropriate waiting period depends on the cancer treatment received and any concerns about treatment-related sperm damage. Discuss timing with your oncology team rather than applying the same 1-2 year interval recommended for women planning a pregnancy.

For women planning a pregnancy, the care team may recommend a pre-pregnancy review before they start trying to conceive. This may include checking your fertility, reviewing any ongoing medicines and assessing the long-term effects of treatment on your heart, lungs, kidneys, liver or hormones. 

These checks are particularly important after treatments that may have affected these organs, such as certain chemotherapy medicines, chest radiotherapy, or total-body radiation.

Is pregnancy safe after cancer?

Pregnancy after successful cancer treatment is often safe for both the mother and baby, but individual risks depend on the cancer, treatment received, current health, and timing of pregnancy. Concerns often arise because pregnancy changes hormone levels and places additional demands on the body. 

Previous chemotherapy or radiotherapy does not usually mean that a future baby will have a higher risk of birth defects, provided pregnancy is planned after the recommended treatment-specific waiting period. However, certain previous treatments can affect pregnancy health. 

For example, radiation to the pelvis or uterus may affect the uterus and increase the risk of miscarriage, premature birth, or low birth weight. For this reason, pregnancy after cancer may involve closer monitoring.

When to speak with a fertility specialist 

Consider speaking with a fertility specialist if your cancer treatment may have affected your ability to conceive or carry a pregnancy. 

Speaking with a fertility specialist may be helpful if you have had:

• Chemotherapy, especially high-dose treatment or medicines known to affect the ovaries or sperm production.
• Radiotherapy to the pelvis, abdomen, brain, testes or ovaries.
• Surgery involving the ovaries, uterus, cervix, fallopian tubes, testes, prostate or other reproductive organs.
• A stem-cell or bone marrow transplant, with intensive chemotherapy or total-body radiation.
• Hormone therapy for hormone-sensitive cancer, particularly if treatment is ongoing or you want to discuss whether a treatment interruption for pregnancy could be considered with your oncology team.
• Targeted therapy or immunotherapy.
• Cancer treatment during childhood or adolescence.

You may also wish to see a fertility specialist if your periods have not returned after treatment, have become irregular, or if semen testing suggests reduced sperm production. They can assess the possible effects of your previous treatment and discuss relevant fertility options. Decisions about when to try for pregnancy should be made together with your oncology team.

How HiA can help

Whether you are deciding about fertility preservation before treatment starts or thinking about pregnancy after treatment has ended, it can be hard to know which specialist to see first, when to arrange testing, and how your treatment history affects your options. You may also need input from more than one team –  your oncologist, a fertility specialist, and, if you become pregnant, an obstetrician familiar with your treatment history.

We do not diagnose, assess your fertility or recommend a treatment. We can help you find a suitable fertility specialist, gynaecologist, urologist or reproductive medicine doctor based on your cancer history and the support you are looking for.

Our Care Team can help you:

• Find a fertility specialist, reproductive medicine doctor, gynaecologist or urologist suited to your cancer history and what you are looking for, and arrange the appointment
• Check what your insurance company may cover and whether pre-authorisation or panel requirements apply before you proceed

The matching costs you nothing, and the specialist's fee is the same as booking directly.

If you are unsure about your next step after cancer treatment, WhatsApp our Care Team. Tell us what cancer treatment you have completed and the support you are looking for, and we can help connect you with an appropriate specialist before you book.