Some cancer treatments can reduce or end the ability to have children later, in both women and men. Options to preserve fertility exist, but they are usually time-sensitive and generally need to happen before treatment starts. That makes the single most important message simple: if fertility matters to you, raise it early — ideally at diagnosis, before treatment begins. This guide explains why treatment can affect fertility, the options for women and men, who to talk to, and how assisted reproduction is regulated in Singapore, so you can have an informed conversation quickly.
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This is general information, not a substitute for specialist advice, and it quotes no success rates because these vary greatly. The key safety point is timing: preservation is generally only possible before treatment, so ask your oncologist at diagnosis, not after. Do not delay urgent cancer treatment for fertility steps without your oncologist’s guidance — balancing the two is a specialist decision.
Why cancer treatment can affect fertility
Several treatments can affect fertility. Chemotherapy — particularly certain types — can harm the cells that make eggs or sperm; radiotherapy to the pelvis or reproductive organs can affect fertility, as can some radiotherapy to other areas; surgery involving the reproductive organs may reduce or remove fertility; and some hormone therapies affect it too. Importantly, the effect may be temporary or permanent, and it varies with the type of treatment, the dose, the duration and your age. Because the impact is not always predictable, it is worth discussing your specific plan with your team.
Raise it before treatment — the time-sensitive message
This is the heart of the guide. Fertility preservation generally has to be done before cancer treatment begins, so the time to ask is at diagnosis, while the plan is being made. Even when time is short, it is still worth raising, because options and timelines vary by cancer type and how urgently treatment must start. If your doctor or nurse has not brought up fertility and it matters to you, ask them — it is an entirely reasonable thing to raise, and a prompt question can open options that would close once treatment starts.
Options for women
Several approaches may be possible for women, and a fertility specialist advises what suits you. Egg freezing involves retrieving and freezing unfertilised eggs; embryo freezing fertilises eggs first and then freezes the resulting embryos; and ovarian tissue freezing removes and preserves ovarian tissue. Other approaches include moving the ovaries surgically out of a radiation field, or using medication to try to protect the ovaries during chemotherapy. Suitability and success vary considerably, and not every option is available or appropriate for everyone, which is why an individual specialist assessment matters.
Options for men
For men, the main and most established method is sperm banking — freezing and storing sperm — ideally done before treatment starts. It is a relatively quick and straightforward step for many, which is one reason raising fertility early is so useful. Other approaches exist for particular situations, but they are specialist decisions rather than routine options. As with women, a fertility specialist is the person who can explain what is realistic and appropriate for your circumstances.
Who to talk to
Two people matter here: your oncologist, who can refer you — often urgently — and a fertility specialist, who assesses and carries out preservation. Your cancer doctor can usually refer you to a fertility clinic quickly, so the practical first step is simply to say that fertility is important to you and ask for a referral. Acting through both, promptly, is what makes preservation possible within the narrow window before treatment.
Not everyone is suitable or has time
It is important to be honest that preservation is not possible for everyone. The type and stage of the cancer, how urgently treatment must start, your age, and individual factors all affect what can be done, and sometimes treatment simply cannot safely wait. Framing this realistically — a specialist will assess what is achievable for you — helps avoid both false hope and unnecessary despair. Even where preservation is not an option, knowing that you asked and understood the situation can bring its own peace of mind.
The emotional side, Singapore context and next step
This is a hard, fast decision at an already stressful time, and there is no right or wrong way to feel about it. Counselling and support are available — through oncology nurses, fertility clinic counsellors, your GP, and cancer support services — and our coping emotionally with cancer guide may help. In Singapore, assisted reproduction services are licensed and regulated by the Ministry of Health under the Healthcare Services Act, so care is provided by licensed centres, and a fertility specialist will explain the process, the consent and storage arrangements, and what is realistic; our when to see a fertility specialist guide is a useful companion. The reassuring bottom line is that fertility preservation is a recognised part of cancer care with real options for many people — and the one thing that most protects those options is asking early, before treatment begins.
Related cancer treatment & support topics
- Cancer surgery: what to expect
- Hormone therapy for cancer
- Managing chemotherapy side effects
- Cancer-related fatigue
- Eating well during cancer treatment
- Coping with hair loss
- Understanding clinical trials
- Coping emotionally with cancer
- Life after cancer treatment
- Cancer treatment costs in Singapore
- Oncologists in Singapore
Sources
- National Cancer Institute — Fertility issues in girls and women / boys and men: cancer.gov
- Macmillan Cancer Support — Fertility: macmillan.org.uk
- Healthcare Services Act — Licensable healthcare services (assisted reproduction): hcsa.gov.sg