What radiotherapy means in pregnancy

Radiotherapy uses high-energy beams aimed at a defined area. Depending on the body region and stage of pregnancy, radiation may reach or scatter towards the uterus. The oncology and maternity teams therefore weigh the cancer’s urgency, the treatment area, pregnancy stage and available alternatives. They may recommend delaying radiotherapy, changing the treatment approach, or discussing care that protects your health while pregnancy continues.

The decision is not made from a general rule. It needs coordinated input from oncology, obstetric and medical physics specialists, with clear discussion of benefits, uncertainties and possible effects on the pregnancy. Do not stop or postpone a cancer appointment while waiting for advice.

Tell every clinician that you are pregnant, your estimated due date, and whether pregnancy was confirmed by a test or scan. Bring your medicines and prior imaging information. Ask for a joint appointment so cancer treatment and maternity care are considered together. If radiotherapy is proposed, ask how the field will be planned, what shielding or alternatives are available, and whether treatment timing can change. Read the dedicated radiotherapy information before your consultation.

Contact your maternity service urgently for vaginal bleeding, fluid leakage, painful regular contractions, severe abdominal pain, reduced fetal movement after you have been advised how to monitor it, or feeling acutely unwell. Seek emergency help for collapse, severe breathing difficulty or heavy bleeding. Contact the oncology team promptly for rapidly worsening cancer symptoms or a new treatment reaction.

What is the treatment goal and how quickly does it need to begin? Where would radiation be directed relative to the uterus? What alternatives could be considered during pregnancy? Which specialists will coordinate my care? How will my health and the pregnancy be monitored?