A pelvic ultrasound is a scan that looks at the organs and structures in your pelvic area. It lets your doctor look at your:

• Uterus.
• Cervix.
• Bladder.
• Fallopian tubes.
• Ovaries.

Your doctor can also use Doppler ultrasound. It allows them to see how blood is flowing in certain pelvic organs.

Ultrasound uses a device called a transducer to send out sound waves that are too high to be heard. The transducer sends the sound waves through your skin and other body tissues to the organs and structures within. The sound waves bounce off the organs like an echo and return to the transducer. The transducer picks up the reflected waves. These are changed into a picture of the organs.

The ultrasound technologist puts a clear gel on your skin and moves the transducer on the gel. The gel lets the technologist move the transducer smoothly over your skin. It also helps conduct the sound waves.

Pelvic ultrasound may be done in two ways:

• Transabdominal. A transducer and gel are put on your belly.
• Transvaginal. A long, thin transducer is covered with a plastic or latex sheath and gel. The transducer is then put into the vagina.

The type of ultrasound procedure you have depends on why you need it. You may need only one type of pelvic ultrasound. Or you may need both to help your doctor make a diagnosis or give you treatment.

You may need a pelvic ultrasound so your doctor can measure or look at your pelvic organs. Your doctor may use the ultrasound to look at:

• The size and shape of your uterus and ovaries and where they are.
• The thickness and density of tissues and organs in your pelvis.
• Fluids or masses in the endometrium, muscles of the uterus (myometrium), fallopian tubes, or bladder.
• The length and thickness of your cervix.
• Changes in the shape of your bladder.
• Blood flow through your pelvic organs.

Pelvic ultrasound can give your doctor lots of information about the size, place, and structure of pelvic masses. But ultrasound can't give a definite diagnosis of cancer or a specific disease.

Your doctor may use pelvic ultrasound to help:

• Find problems in the structure of the uterus, including endometrial conditions.
• Find fibroid tumors (benign growths), masses, cysts, and other types of tumors in the pelvis.
• Find an IUD (intrauterine contraceptive device).
• Diagnose pelvic inflammatory disease or other types of inflammation or infection.
• Find the cause of bleeding after menopause.
• Watch your ovaries if you are being treated for infertility.
• Collect fluid and eggs from egg sacs (follicles) in the ovaries for in vitro fertilization.
• Diagnose pregnancy that happens outside of the uterus, often in the fallopian tube (ectopic pregnancy).
• Watch how your fetus is growing during pregnancy.
• Look at certain fetal conditions.

Your doctor may also use ultrasound to help with other procedures such as endometrial biopsy. Transvaginal ultrasound may be used with a procedure called sonohysterography. For this, your uterus is filled with fluid. This allows your doctor to get a better image of the inside of the uterus.

Your doctor may have other reasons to advise a pelvic ultrasound.

Ultrasound doesn't use radiation. You usually won't feel any discomfort when the transducer is moved across your skin during a transabdominal ultrasound. You may have a little discomfort when the transvaginal transducer is put into your vagina.

The transvaginal ultrasound transducer is covered in a plastic or latex sheath. This may cause a reaction if you have a latex allergy.

During a transabdominal ultrasound, you may have discomfort from a full bladder or from lying on the exam table.

If you need to have a transabdominal ultrasound right away, your doctor may put a thin tube (urinary catheter) into your bladder to fill it.

You may have other risks depending on your health condition. Talk with your doctor about any concerns you have before the procedure.

Some things can affect your test results. These include:

• A larger body size.
• Barium within your bowel from a recent barium test.
• Intestinal gas.
• A bladder that isn't full enough for the test (transabdominal ultrasound). A full bladder helps move the uterus up and moves the bowel away to get a better image.

• Your doctor will explain the scan to you. Ask any questions you have about the scan.
• Tell your doctor if you are sensitive to or are allergic to latex.
• You often can eat and drink as normal before the scan. You won't need medicine to help you relax or go to sleep, unless the ultrasound is part of another procedure that needs anesthesia.
• Wear clothing that you don't mind getting gel on. The gel put on your skin during the scan doesn't stain clothing, but some of it may stay on your skin after the scan.
• For a transabdominal ultrasound, you will be asked to drink several glasses of water or other liquid 1 to 2 hours before the scan. Don't empty your bladder until the scan is over.
• For a transvaginal ultrasound, empty your bladder right before the scan.
• Follow any other directions your doctor gives you to get ready.

You may have a pelvic ultrasound done in your doctor's office. Or you may have it as an outpatient or as part of your stay in a hospital. The scan process may vary depending on your condition and your doctor's practices.

1. You will remove any clothing, jewelry, or other objects that could get in the way of the scan.
2. You will be given a gown to wear if you need to remove clothing.
3. You will lie on your back on an exam table.
4. The technologist will put gel on your belly (abdomen).
5. The technologist will press the transducer against your skin. They will move it over the area being studied.
6. If the technologist is looking at blood flow, you may hear a "whoosh, whoosh" sound when the Doppler mode is used.
7. You will see images of your pelvic area on the computer screen. Images will be recorded for your health care records.
8. When the technologist finishes the scan, they will wipe off the gel.
9. You may empty your bladder when the scan is done.

1. You will remove any clothing, jewelry, or other objects that could get in the way of the scan.
2. You will be given a gown to wear.
3. You will lie on an exam table. Your feet and legs will be supported as for a pelvic exam.
4. The technologist will cover the transvaginal transducer with a plastic sheath. They will put gel on it. They will put the tip of the transducer into your vagina. This may be slightly uncomfortable.
5. The technologist will gently turn and angle the transducer. This brings the areas for study into focus. You may feel mild pressure as the transducer is moved.
6. If the technologist is looking at your blood flow, you may hear a "whoosh, whoosh" sound when the Doppler probe is used.
7. You will see images of your pelvic area on the computer screen. Images will be recorded for your health care records.
8. When the technologist finishes the scan, they will remove the transducer.

You don't have to do anything special after a pelvic ultrasound. Return to your normal diet and activity unless your doctor tells you not to.

Your doctor may give you additional instructions, depending on your situation.

Before you agree to the test or the procedure, find out:

• The name of the test or procedure.
• The reason you are having the test or procedure.
• What results to expect and what they mean.
• The risks and benefits of the test or procedure.
• What the possible side effects or complications are.
• When and where you are to have the test or procedure.
• Who will do the test or procedure and what that person's qualifications are.
• What would happen if you did not have the test or procedure.
• Any alternative tests or procedures to think about.
• When and how you will get the results.
• Who to call after the test or procedure if you have questions or problems.
• How much you will have to pay for the test or procedure.