Breast Cancer in Special Groups: Breast Cancer in Pregnancy
Treatment during pregnancy requires a coordinated plan based on cancer features, gestational age and maternal and fetal health.
The key things to know
- Breast symptoms can be investigated during pregnancy.
- Treatment safety depends on the medicine and gestational stage.
Do not delay assessment
Pregnancy changes breast size and texture, but a persistent lump or unusual change still needs assessment. Pregnancy-adapted imaging and biopsy can be arranged when needed. Evaluation should not automatically wait until after delivery because breast changes are common during pregnancy.
A coordinated specialist team
Breast and oncology specialists work with obstetric, maternal-fetal medicine and anaesthetic teams. They balance timely cancer treatment against risks at different stages of pregnancy. The patient should receive a clear explanation of alternatives and remain central to decisions about care.
How treatment may change
Surgery may be possible during pregnancy. Some chemotherapy can be used after the first trimester, with careful scheduling near delivery. Radiotherapy is usually deferred until after birth. Endocrine treatment and many targeted medicines are unsuitable during pregnancy; timing must be individualised.
Birth, feeding and support
Delivery timing is planned around mother and baby; diagnosis alone does not automatically require early birth. Some treatments are incompatible with breastfeeding, so ask before starting medicines or resuming feeding. Emotional and practical family support are important during treatment and newborn care.
Take these questions to your appointment
- How will oncology and maternity teams coordinate?
- What is the plan for delivery and infant feeding?
Sources & review
This is original educational content based on the sources below, not reproduced textbook material. Website supervisor: Dr. Nizar Ismail. Individual medical review of this article is pending.
- Breast Cancer Now — Breast cancer during and after pregnancy ↗
- American Cancer Society — Treating Breast Cancer During Pregnancy ↗
This information cannot replace diagnosis or a personal treatment plan. Consult your care team about symptoms or decisions about your treatment.
