Some types of treatment (eg, chemotherapy) can cause infertility, although this isn't the case for everyone and many women have their period return within a year after treatment. If having children is important to you, it may be possible to see a fertility specialist before your treatment starts, to look at your options for preserving your fertility. For many women, being unable to have children is a difficult reality to face. It's important to seek support from your partner, whānau, close friends, doctor and breast cancer team.
During treatment it's recommended that you use contraception, as you could still get pregnant over this time and the treatments can harm a developing pregnancy. It's usually advised that you use a reliable method of contraception for a couple of years after the end of treatment too. This is the time cancers are more likely to come back which may affect your decision about having a baby.
For women who become pregnant after finishing successful treatment, there's no evidence pregnancy increases the risk of breast cancer recurring.
About one in 20 breast cancers is caused by a faulty breast cancer (BRCA) gene. If yours was caused by such a gene, your healthcare provider can help you decide whether genetic testing would be helpful for your wider whānau.