Pelvic ultrasound can use a probe over the lower abdomen, an internal vaginal probe or both. The clinical question, suitability and your informed consent guide the choice.
You have been advised to have a pelvic ultrasound for bleeding or another nonpregnancy pelvic concern. The appointment letter may mention a full bladder, an internal scan or both. These are different ways of obtaining information, and the right choice starts with the question your clinician needs answered.
The direct answer
An abdominal scan moves a probe over the lower tummy. A transvaginal scan uses a slim covered probe inside the vagina to obtain closer views of pelvic structures. The team may offer one or both, considering the clinical question, image quality, your circumstances and your consent. An internal scan is an offer that must be explained, rather than an automatic requirement.
What can each approach show?
Both use sound waves to form images. They can help assess the uterus, its lining and the ovaries. An abdominal view gives a broader overview, while a transvaginal view may provide more detail of structures closer to the probe. Neither method answers every possible cause of pelvic symptoms.
Bowel gas, body tissues, organ position and the size or location of a finding can affect the images. A request for another view does not automatically mean that a serious abnormality has been found. Ask which question remains unanswered.
Why might both be useful?
The views can complement each other. A larger structure may be easier to assess from the abdomen, while closer internal views can clarify other details. The practitioner considers what has already been seen before recommending an additional examination.
This article concerns nonpregnant pelvic and bleeding assessment. Pregnancy scans and fertility monitoring have their own questions and preparation; do not substitute instructions from those pathways for your appointment letter.
What does consent involve?
The practitioner should explain why an internal scan is being offered and what it involves. Tell them about discomfort, previous difficult examinations, access needs or any concern that affects your decision. Ask about privacy and the chaperone arrangements.
You can decline the internal examination or ask for it to stop. Ask what an abdominal scan could still establish and what its limitations would be in your case. The decision should not be reduced to marital status. Individual circumstances, appropriateness and consent need discussion with the clinical team.
How should you prepare?
An abdominal pelvic scan commonly needs a comfortably full bladder. The internal part is generally performed after emptying it. Follow the imaging department's actual instructions, including the timing and amount to drink when specified. Contact the team if you have a fluid restriction or cannot manage the requested preparation.
Do not assume that every pelvic scan requires fasting, changing prescribed treatment or postponing the test because you have a period. Check the appointment instructions and ask the department about your circumstances. Tell them if pregnancy is possible because that may change the assessment.
How are the results used?
The report describes what was seen and any limitations. Your clinician interprets it with your symptoms, examination and previous results. A normal scan does not exclude every cause of bleeding or pelvic discomfort. Persistent symptoms may still need review, and additional testing should answer a specific clinical question.
Before leaving, find out who receives the report, when you should discuss it and whom to contact if you have heard nothing. Severe or rapidly worsening symptoms require prompt medical assessment rather than waiting for a routine scan appointment.
Frequently asked questions
Must every pelvic scan include an internal scan?
No. It depends on the question, available views, individual suitability and consent.
Can I ask for the internal scan to stop?
Yes. Tell the practitioner immediately if you want to stop or need a pause.
Does ultrasound use X-rays?
No. Ultrasound forms images using sound waves rather than ionising radiation.
Does a normal scan explain every symptom?
No. The result needs to be interpreted with the clinical history, and persistent symptoms may need further assessment.
Should I copy another patient's preparation?
No. Follow your own imaging department's instructions and clarify anything that is uncertain before attending.
For relevant background, see our heavy periods assessment guide. Bring your symptom notes and reports to a planned consultation.
