Radiation therapy

Radiation therapy (also called radiotherapy) uses a controlled dose of radiation to kill cancer cells or damage them so they cannot grow and multiply. It can be delivered from outside the body (external beam radiation therapy) or inside the body (usually brachytherapy).

The risk of infertility will vary depending on the area treated, the dose of radiation and the number of treatments.

• Radiation therapy to the pelvic area (for cancer of the rectum, bladder, cervix, uterus or vagina) can stop the ovaries producing hormones. This results in temporary or permanent menopause. If your ovaries don’t need treatment, one or both may be surgically moved higher in the abdomen and out of the field of radiation. This is called ovarian transposition or relocation (oophoropexy), and it may help the ovaries keep working properly.

• Radiation therapy to the pelvic area can also affect the uterus, make sexual intercourse uncomfortable, and increase the risk of miscarriage, premature birth and low birth weight.

• Radiation therapy to the brain may damage the pituitary gland, which releases hormones that tell the ovaries to release an egg each month. This may affect ovulation.

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