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Breast cancer in young women

What does being a young woman mean?

In relation to breast cancer, young women generally refers to women who are pre-menopausal. Young women can have some different challenges from women who are post-menopausal at the time of diagnosis.

"My breast cancer diagnosis came out of the blue, it was a real shock. A young woman in her 20s or 30s is not thinking about dying. Breast cancer forced me to examine the issue of my mortality. At the time I would have preferred to be making decisions like 'what movie will I see?' " -- Laura

The Australian Institute of Health and Welfare's report, Cancer in Australia 2019, provides estimates of the number of women diagnosed with breast cancer by age. 

Age group (years) Number of Australian women diagnosed  % of all women diagnosed *
Younger than 20 1 Less than 1
21 to 29 83 Less than 1
30 to 39 810 4.2
40 to 49 2,991 15.4
50 +  15,485 79.9

Key issues

Young and pregnant

Although being diagnosed with breast cancer when pregnant is rare, it does happen. Treatment options may be different if you are pregnant when diagnosed. Radiotherapy is often not recommended due to the risk to the unborn baby, so some women choose to have a mastectomy instead of breast conservation surgery. If chemotherapy is required, some women choose to wait until after the birth of their child, however studies have shown that babies of women who undergo chemotherapy while pregnant are at no greater risk of complications compared with other babies. 


The effects of chemotherapy and hormone-blocking therapy can make it harder to get pregnant after treatment ends. There are a number of factors which contribute to this issue, including a woman’s age, and the type of treatment she has and how it affects her ovaries. There are a number of methods for preserving fertility before starting treatment, which may or may not be suitable to your situation. If you are planning to become pregnant in the future, or even if you haven't given children much thought, it's best to consider some of these options before you start treatment. These include mature egg freezing, embryo freezing, ovarian tissue freezing, medications and using a donor egg.

Ovarian suppression during treatment

Ovarian suppression during chemotherapy for women with hormone receptor negative breast cancer may help protect the ovaries and improve the chances of women remaining fertile. This fertility treatment involves a particular type of drug (GnRHa – Gonadotropin Releasing Hormone analog) goserelin (Zoladex). This drug blocks the hormones that signal the ovaries to develop and release eggs, and causes the ovaries to temporarily shut down. The aim is to protect the eggs from chemotherapy medicine.

Research has shown that for pre-menopausal women with hormone-receptor negative breast cancer, use of goserelin in combination with chemotherapy may protect fertility. Using goserelin while on chemotherapy may also reduce the chance of the cancer returning and improve chance of survival in this group of women.

Ovarian suppression does not delay cancer treatment. It may be costly and the benefits and risks are not yet fully understood. If you are interested in finding out more about options that may be suitable for you, speak to your specialist. There may be ways you can access goserelin through the PBS.

Fertility-related Choices: A Decision Aid for Younger Women with Early Breast Cancer is a free booklet for young women who have recently been diagnosed with early breast cancer. This booklet contains information about cancer treatment, how it can affect fertility, and fertility options to consider. There are also some worksheets to help you think about these issues. You can order a print copy, or download it here.

Early menopause

Some chemotherapy and hormon-blocking therapies can reduce the level of oestrogen produced in the ovaries, causing your periods to stop temporarily or can bring about permanent early menopause. This generally depends on your age and the medications you are given, but if you have not yet reached menopause, you should discuss this with your doctor before treatment. Early menopause can bring with it uncomfortable side effects, such as hot flushes or vaginal dryness. Talk to your doctor about ways to manage these side effects.

BCNA’s Menopause and breast cancer booklet explains why some treatments, including chemotherapy and hormone-blocking therapies, may cause menopause or mimic menopausal symptoms. The booklet includes plenty of tips for managing symptoms, and was developed in consultation with women with breast cancer and health professionals.
You can download or order a copy from our booklets and fact sheets page or by phoning BCNA on 1800 500 258.

Clinical trials for young women

To see what clinical trials are currently available for young women diagnosed with breast cancer, visit the Australian Cancer Trials website.

More information

  • If you have been diagnosed with breast cancer, you can sign up to BCNA's My Journey, a free resource for women and men with breast cancer. My Journey provides up-to-date, reliable information tailored to your changing needs and circumstances at all stages of your breast cancer journey. 
  • Fertility-related Choices: A Decision Aid for Younger Women with Early Breast Cancer provides information on breast cancer and fertility. Download or order a copy from our booklets and fact sheets page, or call 1800 500 258 and we will post you a free copy.
  • BCNA’s Menopause and breast cancer booklet aims to help women manage the symptoms of menopause that result from breast cancer treatment. Download a copy from our booklets and fact sheets page, or call 1800 500 258 and we will post you a free copy.
  • Join BCNA's online network to connect and share with other women in a similar situation.
  • The personal stories section includes stories written by young women with breast cancer.


  • Breast Cancer and early menopause: A guide for younger women is an information booklet produced by Cancer Australia, and is available to download.
  • Breast Cancer in Younger Women is a fact sheet produced by The Westmead Breast Cancer Institute, and is available for download.


  • Young Survival Coalition is an international organisation dedicated to the concerns and issues that are unique to young women with breast cancer and includes a bulletin board for support.
  • Sharsheret is a USA-based organisation of cancer survivors dedicated to addressing the unique challenges facing young Jewish women living with breast cancer.
  • The US-based Hope For Two website provides information and support to women diagnosed with breast cancer while pregnant.

Support groups