Pelvic Ultrasound: What It Shows and How the Scan Works
If your doctor has recommended a pelvic ultrasound, it’s natural to wonder what actually occurs during the appointment and what the scan can reveal about your health. It is one of the most widely used tests in the gynaecology world, and for good reason. It’s fast, usually painless, and gives doctors a clear view of organs that are otherwise hard to examine.
What Is a Pelvic Ultrasound?
Pelvic ultrasound is an imaging test. It uses high-frequency sound waves (not radiation) to create a picture of the organs in your pelvis. It’s a safe, non-invasive way to view the uterus, ovaries, cervix, and surrounding structures, and it’s used at every stage of life, during pregnancy, around your period, or after menopause.
There are two main ways to do a pelvic ultrasound: transabdominal and transvaginal. Many appointments use both, one after the other, to get the clearest possible picture.
Transabdominal Ultrasound
For the transabdominal scan, a small handheld device called a transducer is moved over your lower abdomen after some gel has been applied. This method is used to look at your uterus, cervix, ovaries and any other structures in your pelvis. Your bladder and kidneys can also be checked at the same time.
Usually, for this scan you will be asked to drink water beforehand so that your bladder is full. If your bladder is full, it pushes the bowel aside, and sound waves travel better in fluid, which gives a better picture of your pelvic organs.
Transvaginal Ultrasound
A transvaginal ultrasound is an internal ultrasound, where a thin, lubricated probe, no thicker than a tampon, is inserted into the vagina. This technique allows pelvic structures to be visualised with much more clarity than a transabdominal scan because the probe is much closer to the organs being examined.
A transvaginal scan should not be painful unless you are already in pain from the symptoms you are experiencing, but it can feel similar to having a smear test. You’ll usually be asked to empty your bladder first, and a chaperone will be with you the whole time for your comfort and privacy. If you are having a period, you can still have the scan, but you will need to remove a tampon beforehand if you are wearing one.
As a quick aside, the current guidance also allows for transvaginal scans for women who’ve never had sex, if they’re aged 16 or over and give their consent. So, it’s not about sexual history. Know More : Pelvic Ultrasound Vs Transvaginal Ultrasound
What Does a Pelvic Ultrasound Show?
A pelvic ultrasound provides doctors with detailed pictures of several structures. It can help doctors identify or rule out a wide range of conditions, such as:
Uterine fibroids – non-cancerous growths in or around the womb
Ovarian cysts – sacs filled with fluid that form on the ovaries
Endometrial thickness is useful in the assessment of abnormal bleeding
Signs of endometriosis, especially ovarian endometriomas, although some types of endometriosis are more difficult to identify with ultrasound alone.
Shape and structure of the uterus, congenital deviations
Early pregnancy viability from approx. 6 weeks
Positioning of IUD (coil) to ensure it is sitting correctly
Pelvic pain causes: ovarian torsion or PID
Polyps of the uterine lining
“Ultrasound is a way of looking for and following these problems; it’s not a diagnosis in itself,” he says. An ultrasound can be very good at suggesting endometriosis by spotting ovarian endometriomas, for example, but some types are harder to see clearly on a regular scan, and further tests or a specialist review may be needed to confirm a diagnosis.
Why Might You Be Offered a Pelvic Ultrasound?
Some reasons a doctor may order this scan include:
Pain in the pelvis, either sudden or persistent
Heavy or irregular vaginal bleeding
Irregular menstrual periods
Fertility studies
A lump or mass felt during a physical exam
Monitoring of a known condition, e.g., fibroids or cysts
Early pregnancy confirmation or an ectopic pregnancy test
Checking IUD position
What Happens During the Appointment?
The typical pelvic ultrasound appointment is pretty much the same, whether it is one type of scan or both:
Check-in/confirmation. The sonographer will introduce themselves and confirm your identity and what to expect from the scan.
Transabdominal scan (if needed). Gel is applied to your lower abdomen. The probe is moved lightly over your lower abdomen, and images are shown on the screen.
Transvaginal scan (if needed). You will be asked to undress from the waist down and will be afforded privacy to do so. A thin probe is then gently passed in, and a chaperone remains in attendance throughout.
Image check. The reporting doctor can then pick images to look at later.
Wrap up. You will be given tissue to wipe off any gel and can get dressed.
Most appointments last a total of 15 to 30 minutes, depending on whether one or both types of scans are needed.
How to Prepare
Preparation varies according to the type of scan you’re having:
Unless advised otherwise, you will normally be instructed to drink water and arrive with a full bladder for a transabdominal scan.
For a transvaginal scan, you’ll probably be asked to empty your bladder first.
Wear loose, comfortable clothing to make the appointment easier.
Remove a tampon before a transvaginal scan, if applicable.
Continue to take any medication that you have been prescribed as usual unless your doctor tells you otherwise.
Is a Pelvic Ultrasound Safe?
Yes. Ultrasound is one of the safest imaging methods out there (even safe during pregnancy) because it doesn’t use radiation—it uses sound waves. Both transabdominal and transvaginal scans are very safe procedures and have no known side effects.
When Will You Get Your Results?
In most cases, your scan will be reviewed and reported on the same day. If your GP has referred you, you will usually be asked to make a follow-up appointment in about two weeks to discuss the results and what will happen next. If the scan was requested by a specialist team, they will usually arrange to discuss the findings with you directly.
Getting a Pelvic Ultrasound
If you have pelvic pain, irregular bleeding, fertility issues or require a scan as part of routine antenatal or gynaecological care, a pelvic ultrasound is often the quickest way to get real answers. At myGynaePlus, experienced consultants and senior sonographers carry out pelvic and transvaginal ultrasound scans, available on the same day, with a clear explanation of what the scan has shown and advice on next steps if further investigation or treatment is required.
Final Thoughts
A pelvic ultrasound is one of the most useful, low-risk tools for understanding what’s going on with your reproductive organs. They want to confirm an early pregnancy, investigate pain, or check on a known condition. The combination of transabdominal and transvaginal imaging gives doctors a genuinely detailed view without the need for anything invasive. Hopefully, if you’ve been told you need one, knowing exactly what to expect makes the appointment feel a lot less daunting.
Frequently Asked Questions
Does a pelvic ultrasound hurt?
For a transabdominal scan, you should not feel anything other than the pressure of the probe on your skin. You might find a transvaginal scan a bit strange, like a smear test, but it shouldn’t hurt unless you are already in pain from another condition.
Do I need a full bladder for every pelvic ultrasound?
Transabdominal scanning only. If you’re having a transvaginal scan, you’ll usually be asked to empty your bladder beforehand instead, as a full bladder isn’t needed for this method.
Can I have a pelvic ultrasound during my period?
Yes. A period does not affect the scan, but if it’s a transvaginal ultrasound, you will need to remove a tampon first.
How long does a pelvic ultrasound take?
Appointments will generally be 15-30 minutes depending on whether you are having a transabdominal scan, a transvaginal scan, or both.
Can a pelvic ultrasound diagnose endometriosis?
It can be very suggestive of endometriosis, especially ovarian endometriomas, but it cannot detect all forms of the disease. If your ultrasound is normal but you still have symptoms, you may need more investigation.
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