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If you're planning to become pregnant after breast cancer treatment, your treatment team will discuss your fertility with you.
After your treatment has finished, there’s no totally reliable way of checking how it has affected your fertility.
To check if your ovaries are working, your specialist will ask about your periods, whether they have started again and whether you have any menopausal symptoms.
A series of blood tests to check the levels of a hormone called FSH (follicle stimulating hormone) can be taken. The results of these can show whether you have gone through the menopause.
Sometimes a blood test will also be taken to check the level of a hormone called AMH (anti-mullerian hormone) as this may give more accurate information about how your ovaries are working.
An ultrasound scan of the ovaries may also be helpful and is offered in some fertility centres.
You may not be able to find out straightaway after your treatment has finished if you’re still fertile. For example, you may have to wait three to six months after your chemotherapy before your blood FSH levels can be tested.
If you’re taking tamoxifen, it may be possible to test FSH levels. However, your treatment team may recommend that you stop taking tamoxifen for a few weeks before checking blood levels as there are concerns that the tamoxifen could make the test results less reliable.
Even when fertility returns after chemotherapy, the menopause is likely to occur earlier than would usually be expected. Women who have had chemotherapy are often referred to a fertility clinic after six months of trying to get pregnant naturally because of the chance of early menopause.
Some women trying to become pregnant use ovulation prediction kits sold in chemists to find out when they’re ovulating. If you’re having periods this can be a quick way to check if and when you’re ovulating.
For many women, deciding whether to try to get pregnant after a diagnosis of breast cancer is difficult.
If you’re able to become pregnant and have a baby after your breast cancer treatment, there’s no evidence that you’re at increased risk of the cancer returning. There’s also no evidence that there are any health risks for children born after breast cancer treatment.
Many specialists advise women to wait for at least two years before becoming pregnant. This is because the possibility of the cancer coming back can lessen over time, and you may be at greatest risk in the first two years after diagnosis.
Waiting for this long may not be appropriate for everyone. If you’re thinking about getting pregnant before this two-year period is up, talk to your specialist. They can help you make an informed choice. You may want to discuss your own individual risk of recurrence as well as other relevant factors, including your age and what treatment you have already had and any that’s ongoing.
If you’re offered hormone therapy, it’s usually taken for five to ten years, by which time you may be facing a natural menopause. Therefore, some women choose to take a break from hormone therapy if they want to try to get pregnant. A trial called the POSITIVE trial (Pregnancy Outcome and Safety of Interrupting Therapy for Women With Endocrine Responsive Breast Cancer) is looking into the safety of interrupting hormone therapy to try to get pregnant.
Some women start taking hormone therapy again after the birth of their baby. If the length of hormone therapy concerns you, talk to your treatment team who will be able to advise you further. If you’re planning to get pregnant after you have finished taking hormone therapy, it’s advisable to wait at least two months to allow time for the drug to leave your body completely.
Generally women are not recommended to get pregnant for at least four to six months after chemotherapy treatment.
The targeted therapy trastuzumab (Herceptin) is normally given for a year and is not thought to affect fertility. However, you should avoid becoming pregnant while taking trastuzumab and for at least seven months after treatment has finished. This is because of the possibility of harm to a developing baby.
If your ovaries have been damaged by treatment for breast cancer, it may be possible to become pregnant using eggs donated by other fertile women. They are fertilised with sperm from a partner or donor and the embryo transferred to the womb of the person hoping to become pregnant. There’s a shortage of egg donors in the UK so there may be a long wait for treatment.
The procedure involves taking some hormone drugs for around two weeks to prepare the womb to receive the embryo. The drugs are usually continued for up to 12 weeks if a pregnancy occurs. It’s not known what effects taking these hormone drugs might have. There’s a concern that they might stimulate the growth of breast cancer cells, although no research has proven an increased risk of breast cancer after this procedure.
If you have a child using donated eggs, sperm or embryos, any children born will have the right to access identifying information about the donor when they turn 18.
Find out more information about egg donation on the HFEA website.
Some women who’ve had breast cancer treatment will face the possibility of permanent infertility. This can be devastating and difficult to come to terms with, especially if it comes at a time when you were planning to start a family or before you have completed your family. It may change how you feel about yourself as a woman and you may feel intense grief at the loss your cancer has caused.
If this is the case for you, you may find it helpful to talk to a specialist counsellor. Your breast care nurse or oncologist may be able to arrange this for you.
See Useful organisations for a list of specialist organisations who may offer emotional support as well as information on other options for becoming a parent such as surrogacy, adoption or fostering.
Surrogacy involves another woman carrying a baby for you. This can be an option for women who do not want to take a break from their hormone therapy to become pregnant because they have a higher risk of breast cancer recurrence. The HFEA website has information about surrogacy.
Some women choose to adopt or foster a child. There are many children waiting to be adopted or fostered in the UK and from abroad, and this may be an option for some people. However, adoption and fostering can be a difficult and lengthy process.
See Useful organisations for more information about adoption or fostering.
Some women choose not to have fertility treatment, surrogacy or to adopt a child and go on to enjoy life without being a parent.
Provides information about adoption and support for adoptive families.
A charity providing counselling and support to people affected by infertility. You can also find a councillor in your area.
Provides information on adoption and fostering, and works with everyone involved with adoption and fostering across the UK.
A UK-based charity to help people get in touch with potential surrogates.
Voluntary nationwide support group for women who experience a premature menopause. Allows members to share information about their personal experience of premature menopause.
Information mainly for those considering becoming an egg or sperm donor but also for healthcare professionals and those looking for donors.
Provides support and information, and promotes awareness of fertility issues. Also incorporates More to Life, a national charity providing support to people who are involuntarily childless.
Surrogacy UK was created by experienced surrogate mothers. They wanted to form an organisation that reflected their experience of what makes surrogacy work.
Whatever your feelings, you do not have to cope alone. You may find it helpful to share your thoughts with another person whose fertility has been affected by breast cancer treatment.
You can also call our free Helpline on 0808 800 6000 to talk to one of our trained nurses.
You can also download or order our booklet, Fertility, pregnancy and breast cancer treatment.