While a standard pelvic ultrasound looks through the skin of your belly, a transvaginal scan is performed internally. This method bypasses the muscles and gas in the abdomen, allowing the sound waves to capture highly detailed pictures of the uterus and ovaries.
Common Indications for Transvaginal Ultrasound
Your doctor may request a Transvaginal Ultrasound for:
- Finding the cause of pelvic pain, severe cramping, or irregular bleeding.
- Looking for cysts on the ovaries, uterine fibroids, or polyps.
- Checking the exact placement of an intrauterine device (IUD).
- Investigating the causes of fertility issues.
- During early pregnancy, to assess location and viability and look for signs of complications such as ectopic pregnancy.
What exactly does a Transvaginal Ultrasound show?
It shows the lining of the uterus (endometrium), the muscular walls of the uterus, the cervix, and both ovaries. Because the probe is placed so close to these organs, it can easily detect very small abnormalities that a belly scan might completely miss.
What happens during a Transvaginal Ultrasound procedure?
- You will be asked to undress from the waist down and will be given a sheet or gown for privacy.
- You will lie on your back on the exam table, bending your knees as you would for a standard pelvic exam.
- The Radiographer will use a special ultrasound wand (transducer) that is thin, round at the top, and roughly the diameter of a tampon.
- The wand is covered with a protective sheath and lubricating gel, and is gently inserted 2 to 3 inches into the vagina.
- The Radiographer will slowly angle the wand to get pictures from different views.
Do I need to prepare for a Transvaginal Ultrasound?
Unlike a scan over your belly, you do not need a full bladder for this test. In fact, you will be asked to completely empty your bladder right before the procedure begins so that you are comfortable and the organs are easy to see. If you are on your period, you will simply need to remove your tampon before the exam.
How long does a Transvaginal Ultrasound take?
The scan is fairly quick, usually taking about 15 to 30 minutes.
What should I ask before booking this scan in Nigeria?
Before you choose a centre, ask whether the scan will be done by a female radiographer or sonographer if that matters to you, whether a chaperone is available, and whether the report will be reviewed by a radiologist. Also confirm whether the centre can do both transabdominal and transvaginal views in the same visit, because doctors often request both for pelvic pain, bleeding, fibroids, fertility workup, or early pregnancy assessment.
If you are comparing centres on RadFAQS, look beyond the price alone. A good fit is a centre that explains the internal nature of the scan clearly, gives privacy for changing, documents the uterus and ovaries properly, and tells you how quickly your report will be ready.
Are there different types of Transvaginal Ultrasound scans?
It is very common for a doctor to order both a transabdominal (over the belly) and a transvaginal scan during the same appointment. The belly scan gives a wide overview of the pelvis, while the transvaginal scan provides the zoomed-in details.
Will the scan be painful?
The procedure is generally painless. You will feel mild pressure when the wand is inserted and angled, similar to a routine gynecological exam. If you feel pain, let the Radiographer know immediately.
When should I seek urgent care?
Severe or one-sided pelvic pain, heavy bleeding, fainting, shoulder-tip pain, fever, or a positive pregnancy test with pain or bleeding needs urgent assessment. A very early scan can be inconclusive, so follow the written plan for serial hCG and repeat imaging; one scan may not exclude ectopic pregnancy.
What are the important limitations?
Ultrasound does not use ionising radiation, but a useful result still depends on the clinical question, the operator, the equipment, patient anatomy, and whether the target can be reached by sound waves. Gas, bone, body habitus, pain, movement, and a limited acoustic window can hide disease. A normal scan does not automatically exclude the suspected condition; persistent or worsening symptoms need clinical reassessment and sometimes repeat ultrasound, CT, MRI, laboratory tests, or another specialist test.
Ultrasound should be used for a medical purpose, with output and examination time kept as low as reasonably achievable—especially in pregnancy and with Doppler. Internal scans and procedures require explanation, consent, privacy, and a chaperone according to patient preference and local policy.
Questions to ask your care team
- What exact question should this ultrasound answer, and could anything important remain unseen?
- Is this a screening, diagnostic, surveillance, or procedure-guidance examination, and will the result change care?
- What preparation is required, and should I continue all medicines unless my own clinician gives different instructions?
- When will I receive the signed report, who will explain it, and what symptoms should prompt urgent assessment rather than waiting?
Sources and further reading
Conclusion
A Transvaginal Ultrasound is a safe, minimally invasive procedure that provides your doctor with the clearest possible picture of your pelvic health. Its detailed precision makes it a vital tool for diagnosing reproductive concerns and monitoring early pregnancy.