A trans-vaginal ultrasound uses soundwaves inside the vagina to look at nearby areas such as the womb, womb lining, ovaries and fallopian tubes. It can help diagnose cancer in these areas.
The person doing the scan gently places a small probe with a rounded end into your vagina. The test can be a little uncomfortable, but should not be painful. It only takes a few minutes.
If it's not possible to do the scan inside the vagina, you may have an ultrasound of the pelvis using a probe on your tummy (abdomen).