Pelvic Ultrasound

A pelvic ultrasound uses high-frequency sound waves to create live images of organs and structures inside your lower belly (pelvis). This safe, non-invasive test helps doctors look at your bladder, and for women, the uterus and ovaries, or for men, the prostate and seminal vesicles. It helps diagnose various conditions without using radiation.

What is Pelvic Ultrasound?

A pelvic ultrasound is a medical imaging test that uses high-frequency sound waves to produce real-time pictures of organs and structures within your pelvis. Unlike X-rays, it does not use radiation, making it a safe option for many people, including pregnant individuals. It helps doctors see the size, shape, and position of organs like the bladder, and for women, the uterus and ovaries, or for men, the prostate.

An ultrasound machine sends sound waves through a device called a transducer, which is placed on your skin or inside your body. These sound waves bounce off your internal organs and return to the transducer. A computer then translates these echoes into moving images that appear on a monitor. This technology allows healthcare providers to examine soft tissues and fluid-filled structures that might not show up well on other imaging tests. The images can help identify abnormalities, measure organ size, and observe blood flow. It's a versatile tool used for a wide range of diagnostic purposes. There are different types of pelvic ultrasounds. A transabdominal ultrasound involves moving the transducer over the skin of your lower belly. A transvaginal ultrasound (for women) involves inserting a smaller transducer into the vagina. A transrectal ultrasound (for men) involves inserting a transducer into the rectum. The type used depends on what your doctor needs to see.

Why it's ordered

Doctors order a pelvic ultrasound to investigate symptoms, diagnose conditions, or monitor known issues affecting the pelvic organs. For women, common reasons include pelvic pain, abnormal bleeding, fertility issues, or checking for cysts and fibroids. For men, it can help evaluate prostate problems or fertility concerns. It's also used during pregnancy to monitor fetal development.

For women, a pelvic ultrasound is frequently used to evaluate the uterus, ovaries, and fallopian tubes. It can help diagnose causes of pelvic pain, such as ovarian cysts or uterine fibroids (non-cancerous growths). It's also used to investigate abnormal vaginal bleeding, menstrual problems, or to check for the presence of an intrauterine device (IUD). During pregnancy, a pelvic ultrasound is a routine test to confirm pregnancy, determine the due date, check the baby's growth and development, and monitor for potential complications. It provides valuable information about the baby's health and the mother's reproductive organs. For men, a pelvic ultrasound can help evaluate the prostate gland and seminal vesicles, which are glands that produce fluid for semen. It may be ordered to investigate symptoms like difficulty urinating, blood in the urine or semen, or to help diagnose conditions like an enlarged prostate (benign prostatic hyperplasia) or prostate cancer. It can also be used to assess male fertility issues.

How to prepare

Preparing for a pelvic ultrasound usually involves drinking several glasses of water before your appointment to ensure you have a full bladder. A full bladder helps move your intestines out of the way and provides a clearer view of your pelvic organs. You should also wear loose, comfortable clothing and discuss any medications you are taking with your doctor or the ultrasound technician.

For a transabdominal (over the belly) pelvic ultrasound, you will typically be asked to drink about 4 to 6 glasses of water or other clear fluid about an hour before your exam. It's important not to empty your bladder until after the test. A full bladder acts as an acoustic window, allowing sound waves to travel more easily and providing better images of the uterus, ovaries, and other pelvic structures. If you are having a transvaginal ultrasound, you may be asked to empty your bladder right before the procedure. Your doctor or the imaging center will provide specific instructions based on the type of ultrasound you are having. Always follow the preparation guidelines given to you. It's a good idea to wear loose-fitting, comfortable clothing that allows easy access to your lower belly. You may be asked to remove jewelry or other objects that could interfere with the scan. Inform the technician if you have any allergies, especially to latex, or if you are pregnant, as this information is important for your safety and the accuracy of the test.

What to expect during

During a pelvic ultrasound, you will lie on an exam table. For a transabdominal scan, a clear gel will be applied to your lower belly, and a technician will move a handheld device (transducer) over the area. For a transvaginal or transrectal scan, a lubricated transducer will be gently inserted. The procedure is usually painless, though you might feel some pressure or mild discomfort.

For a transabdominal ultrasound, you will lie on your back. The sonographer (ultrasound technician) will apply a warm, clear gel to your lower abdomen. This gel helps the transducer make good contact with your skin and allows the sound waves to travel effectively. The sonographer will then press and move the transducer across your skin, capturing images from different angles. You might feel some pressure from the transducer, especially if your bladder is very full. If a transvaginal ultrasound is needed, you will be asked to empty your bladder first. You will then lie on your back with your feet in stirrups, similar to a gynecological exam. A thin, lubricated transducer, covered with a disposable sheath, will be gently inserted into your vagina. This type of ultrasound often provides clearer images of the uterus and ovaries because the transducer is closer to these organs. You might feel some pressure or mild discomfort, but it should not be painful. For a transrectal ultrasound, primarily used for men to examine the prostate, a lubricated transducer, covered with a disposable sheath, is gently inserted into the rectum. This allows for very detailed images of the prostate gland. The entire ultrasound procedure typically takes between 15 and 60 minutes, depending on the type of scan and what needs to be examined.

Understanding your results

After your pelvic ultrasound, a specially trained doctor called a radiologist will review the images and prepare a report. This report is then sent to the healthcare provider who ordered the test. Your doctor will discuss the findings with you, explaining what they mean in the context of your overall health and symptoms. They will interpret the results and recommend any next steps.

It's important to remember that an ultrasound report provides information about the structures seen in your pelvis. The radiologist looks for any abnormalities in size, shape, or texture of organs, and notes the presence of any masses, cysts, or fluid collections. For example, in women, findings might include ovarian cysts, uterine fibroids, or signs of endometriosis. In men, it might show an enlarged prostate or other prostate abnormalities. Your ordering doctor will explain what the findings mean for you specifically. They will consider your medical history, physical exam, and any other tests you've had. For instance, a small ovarian cyst might be a normal finding that resolves on its own, while a larger or complex cyst might require further investigation. Do not try to interpret the ultrasound images or report on your own. Only a qualified healthcare provider can accurately explain what the results indicate for your health. They will discuss whether the findings are normal, require monitoring, or necessitate further tests or treatment.

Risks

Pelvic ultrasound is generally considered a very safe diagnostic test with minimal risks. It uses sound waves instead of ionizing radiation, meaning there is no exposure to radiation. There are no known harmful effects from diagnostic ultrasound when performed by trained professionals. Some people might experience mild discomfort from the pressure of the transducer or a full bladder, but serious complications are rare.

Because ultrasound does not use radiation, it is a preferred imaging method for many conditions, especially during pregnancy. The sound waves used are at a frequency and intensity that are not known to cause harm to human tissues. This makes it a safe option for repeated examinations if needed to monitor a condition over time. Any discomfort experienced during the procedure is usually temporary. For example, having a very full bladder for a transabdominal scan can be uncomfortable, but this feeling resolves once the test is complete and you can empty your bladder. During transvaginal or transrectal ultrasounds, some individuals might feel slight pressure or a brief, mild ache during transducer insertion, but significant pain is uncommon. Allergic reactions to the ultrasound gel are extremely rare, as the gel is typically water-based and hypoallergenic. If you have any concerns about discomfort or potential reactions, it's always best to discuss them with your healthcare provider or the ultrasound technician before the procedure begins. They can provide reassurance and ensure your comfort throughout the test.

Frequently asked questions

How long does a pelvic ultrasound take?

A pelvic ultrasound typically takes between 15 to 60 minutes to complete. The exact time depends on the type of ultrasound (transabdominal, transvaginal, or transrectal) and how many organs or areas the technician needs to examine in detail.

Is a pelvic ultrasound painful?

A pelvic ultrasound is usually not painful. You might feel some pressure or mild discomfort, especially if your bladder is very full during a transabdominal scan, or during the insertion of the transducer for transvaginal or transrectal exams. Any discomfort is typically brief and tolerable.

Can I eat or drink before a pelvic ultrasound?

You can usually eat and drink normally before a pelvic ultrasound. However, for a transabdominal scan, you will need to drink several glasses of water about an hour before your appointment to ensure a full bladder. For transvaginal or transrectal scans, you might be asked to empty your bladder.

Do I need to stop taking my medications before a pelvic ultrasound?

In most cases, you do not need to stop taking your regular medications before a pelvic ultrasound. However, it's always best to discuss all your current medications, including over-the-counter drugs and supplements, with your doctor or the ultrasound technician before your appointment.

What is the difference between a transabdominal and transvaginal ultrasound?

A transabdominal ultrasound involves moving a transducer over your lower belly, requiring a full bladder for clearer images. A transvaginal ultrasound involves inserting a smaller transducer into the vagina, often providing more detailed images of the uterus and ovaries, and usually requires an empty bladder.

Can a pelvic ultrasound detect cancer?

A pelvic ultrasound can identify abnormalities like masses, cysts, or growths that might be cancerous. However, it cannot definitively diagnose cancer. If suspicious findings are seen, your doctor will likely recommend further tests, such as biopsies or other imaging, to confirm a diagnosis.

Sources

• MedlinePlus — Pelvic Ultrasound
• Mayo Clinic — Pelvic Ultrasound
• Cochrane Library — Pelvic Ultrasound