Pelvic ultrasound is sometimes offered as an additional examination in Korean health checkup programs.
In screening settings, the examination may be described as:
- Pelvic ultrasound
- Lower abdominal ultrasound
- Uterus ultrasound in women
- Prostate ultrasound in men
For women, pelvic ultrasound may be performed transabdominally or transvaginally. Transabdominal ultrasound places the probe on the lower abdomen, while transvaginal ultrasound uses a probe placed inside the vagina.
Transabdominal ultrasound provides a broader overview of the pelvis, but transvaginal ultrasound generally provides more detailed images of the uterus, endometrium, and ovaries because the probe is positioned closer to these organs.
Some Korean health screening centers offer transvaginal ultrasound as part of selected screening packages or as an optional examination, while others perform only transabdominal screening.
If a screening examination identifies an abnormality that needs more detailed gynecologic evaluation, a dedicated transvaginal ultrasound through an obstetrics and gynecology clinic or department may be recommended.
What Does Transabdominal Pelvic Ultrasound Examine?
The examination differs between women and men.
In Women
A transabdominal pelvic ultrasound may evaluate:
- Uterus
- Endometrium
- Ovaries when adequately visualized
- Adnexal regions
- Bladder
- Larger pelvic masses
Transabdominal ultrasound can provide a useful overview of the pelvis, but visualization of the ovaries and detailed uterine structures may be limited.
In Men
A transabdominal pelvic or prostate ultrasound may evaluate:
- Prostate size
- Bladder
- Post-void residual urine when specifically measured
- Gross lower urinary tract abnormalities
Transabdominal ultrasound can estimate prostate size and assess residual urine, but it is different from a dedicated transrectal prostate ultrasound.
Why Do You Need a Full Bladder?
Transabdominal pelvic ultrasound is usually performed with a full or comfortably filled bladder.
The fluid-filled bladder creates an acoustic window that improves visualization of deeper pelvic structures.
For women, it can help visualize the uterus and ovaries through the lower abdomen.
For men, it improves visualization of the bladder and transabdominal assessment of the prostate.
You may therefore be instructed to:
- Drink water before the examination
- Avoid urinating for a period before the ultrasound
- Arrive with a comfortably full bladder
Follow the center’s instructions rather than drinking an excessive amount of water.
What Can Be Found in Women?
Common findings may include:
- Uterine fibroids
- Ovarian cysts
- Larger adnexal masses
- Uterine enlargement
- Changes that may suggest adenomyosis
- Endometrial abnormalities that require further evaluation
- Other pelvic masses
Not every finding requires treatment.
The significance depends on factors such as:
- Age
- Menstrual or menopausal status
- Symptoms
- Size
- Ultrasound appearance
- Change over time
Uterine Fibroids
Uterine fibroids are benign tumors arising from the muscular wall of the uterus.
Transabdominal ultrasound can often identify moderate or large fibroids and estimate their size and location.
They may be described according to their location as:
- Intramural
- Subserosal
- Submucosal
Reports may also use the terms myoma or leiomyoma, both of which refer to uterine fibroids.
Many fibroids cause no symptoms and require no treatment.
Further gynecologic evaluation may be appropriate when fibroids are associated with:
- Heavy menstrual bleeding
- Anemia
- Pelvic pressure
- Pain
- Fertility concerns
- Other significant symptoms
Small fibroids or abnormalities involving the uterine cavity may be assessed more clearly with transvaginal ultrasound or other dedicated gynecologic imaging.
Ovarian Cysts
Ovarian cysts are frequently encountered on pelvic ultrasound.
In women who are still menstruating, many cysts are physiologic and related to the normal menstrual cycle.
When a cyst is identified, important factors include:
- Age and menopausal status
- Size
- Simple versus complex appearance
- Internal septations
- Solid components
- Blood flow when Doppler is used
- Change over time
- Symptoms
A simple cyst in a premenopausal woman has a very different significance from a complex adnexal mass in a postmenopausal woman.
If an ovarian lesion cannot be adequately characterized on a transabdominal examination, transvaginal ultrasound may provide substantially better detail.
How Well Can Transabdominal Ultrasound See the Ovaries?
This is one of the main limitations of transabdominal pelvic ultrasound.
The ovaries are relatively small and can be difficult to visualize because of:
- Bowel gas
- Body habitus
- Bladder filling
- Position of the ovaries
- Age
- Previous pelvic surgery
- Individual anatomy
One or both ovaries may therefore be incompletely visualized during a routine transabdominal screening examination.
This does not automatically indicate an abnormality.
It simply means that the ovary could not be adequately assessed using that approach.
Transvaginal ultrasound generally provides higher-quality images of the ovaries because the probe is much closer to the pelvic organs.
What About the Endometrium?
The endometrium is the lining of the uterus.
Its appearance and thickness vary according to:
- Menstrual cycle
- Age
- Menopausal status
- Hormonal medication
A transabdominal ultrasound may provide a general view of the endometrium, but transvaginal ultrasound is usually better for detailed endometrial assessment.
This becomes particularly important when investigating abnormal uterine bleeding or postmenopausal bleeding.
A routine transabdominal health-screening ultrasound should therefore not be considered a complete evaluation of unexplained vaginal bleeding.
Does the Menstrual Cycle Affect Pelvic Ultrasound?
Yes, particularly in premenopausal women.
The appearance and thickness of the endometrium change naturally throughout the menstrual cycle. The ovaries may also contain normal follicles or functional cysts that change with the cycle.
For a general screening ultrasound, it is usually not necessary to schedule the examination on a specific day of the menstrual cycle.
However, if a previous ovarian cyst or endometrial abnormality is being followed, the doctor may recommend repeating the ultrasound at a particular point in the cycle to make comparison and interpretation easier.
Having your period does not automatically prevent pelvic ultrasound, although individual centers may have their own policies for transvaginal examinations.
What Is Transvaginal Ultrasound?
Transvaginal ultrasound uses a narrow ultrasound probe placed inside the vagina.
Because the probe is close to the pelvic organs, it generally provides more detailed images of:
- Uterus
- Endometrium
- Ovaries
- Adnexal regions
- Cervix
- Other nearby pelvic structures
It is particularly useful when a transabdominal examination is limited or when a uterine, endometrial, or ovarian abnormality needs more detailed evaluation.
In Korea, some comprehensive health screening centers offer transvaginal ultrasound as an optional or package examination. Others may provide only transabdominal uterus ultrasound.
More detailed evaluation of symptoms or abnormal findings is often performed through obstetrics and gynecology.
Therefore, before booking, it is useful to ask exactly which approach the center uses.
Can Transvaginal Ultrasound Be Performed If the Hymen Is Intact?
Transvaginal ultrasound requires insertion of a narrow ultrasound probe into the vagina and should only be performed with the patient’s informed consent.
An intact hymen does not by itself provide a simple medical rule that determines whether transvaginal ultrasound is possible. Hymenal anatomy varies considerably between individuals.
However, if a patient has never had vaginal penetration, wishes to avoid vaginal insertion, has an anatomical limitation, or feels uncomfortable with the examination, this should be discussed with the medical staff before the test.
In these situations, transabdominal ultrasound is usually the first alternative.
Depending on the clinical question, pelvic MRI or another imaging approach may also be considered.
Transvaginal ultrasound should not be considered mandatory simply because it can provide more detailed images. The examination method should be chosen according to clinical need, anatomy, patient preference, and consent.
Does Pelvic Ultrasound Screen for Ovarian Cancer?
Pelvic ultrasound can detect ovarian and adnexal masses, but this does not mean that routine ultrasound is an effective ovarian cancer screening test.
For women without symptoms and without a known high-risk hereditary cancer syndrome, routine ovarian cancer screening with ultrasound is not recommended.
False-positive findings can also lead to additional testing or unnecessary procedures.
Pelvic ultrasound is more useful when evaluating:
- A known ovarian or adnexal lesion
- Pelvic symptoms
- An abnormality found on another test
- Abnormal bleeding
- A previous lesion requiring follow-up
- Other specific clinical concerns
Women with a strong hereditary risk of ovarian cancer require individualized assessment rather than ordinary screening-center ultrasound.
What Can Be Found in Men?
In men, transabdominal pelvic or prostate ultrasound can identify findings such as:
- Prostate enlargement
- Bladder distension
- Significant residual urine when measured
- Bladder stones
- Gross bladder abnormalities
Benign prostate enlargement becomes increasingly common with age.
Transabdominal ultrasound can estimate prostate size and may also be used to measure the amount of urine remaining in the bladder after urination.
Can Transabdominal Prostate Ultrasound Detect Prostate Cancer?
It should not be used as a stand-alone prostate cancer screening test.
A normal prostate ultrasound does not exclude prostate cancer.
When prostate cancer evaluation is needed, assessment may involve:
- PSA
- Clinical examination
- Prostate MRI
- Biopsy when indicated
A dedicated prostate ultrasound may be performed transrectally and can be used to evaluate the gland or guide biopsy, but ultrasound appearance alone cannot confirm or exclude prostate cancer.
For health screening purposes, transabdominal prostate ultrasound is therefore more useful for assessing prostate size and lower urinary tract findings than for detecting cancer.
What About the Bladder?
Because transabdominal pelvic ultrasound is performed with a full bladder, the bladder can also be assessed.
It may reveal gross abnormalities such as:
- Bladder stones
- Wall thickening
- Large masses
- Significant urinary retention
However, routine screening ultrasound is not a complete evaluation of bladder disease or bladder cancer.
Persistent blood in the urine, recurrent urinary infection, difficulty urinating, or other urinary symptoms require appropriate clinical evaluation.
Do You Need to Fast?
Fasting is generally not required specifically for pelvic ultrasound.
For transabdominal pelvic ultrasound, the important preparation is usually a full bladder rather than an empty stomach.
However, patients undergoing a comprehensive Korean health checkup may still be asked to fast because abdominal ultrasound, gastroscopy, or another examination is being performed on the same day.
Follow the center’s overall preparation instructions.
How Is Transabdominal Pelvic Ultrasound Performed?
You usually lie on your back while gel is applied to the lower abdomen.
The ultrasound probe is moved over the lower abdomen and pelvis.
Pressure from the probe may feel somewhat uncomfortable because the bladder is full, but the examination itself is noninvasive.
It is:
- Radiation-free
- Usually painless
- Performed without contrast material
Once the examination is finished, you can usually empty your bladder immediately.
How Long Does It Take?
A routine transabdominal pelvic ultrasound is generally a short examination.
The time varies according to:
- Which organs are included
- Bladder filling
- Body habitus
- Visibility of the ovaries
- Presence of fibroids, cysts, or other findings
- Need for additional measurements
If an organ cannot be adequately evaluated transabdominally, a different examination may be more useful than simply extending the screening scan.
How Much Does Pelvic Ultrasound Cost in Korea?
Pelvic ultrasound is commonly offered as an optional examination in Korean private health screening programs.
A practical estimate is approximately:
Transabdominal uterus/pelvic ultrasound: ₩70,000–100,000 (about US$47–67)
Transvaginal ultrasound: approximately ₩80,000–120,000 (about US$53–80)
Transabdominal prostate ultrasound: approximately ₩80,000–120,000 (about US$53–80)
using an approximate exchange rate of ₩1,500 per US dollar.
Prices vary according to the institution, examination type, and screening package.
Always confirm whether the examination is already included before adding it separately.
What Happens If Something Is Found?
Most abnormalities found during pelvic screening ultrasound do not require urgent treatment.
Possible next steps include:
- No further evaluation
- Comparison with previous imaging
- Repeat ultrasound
- Transvaginal ultrasound
- Obstetrics and gynecology consultation
- Urology consultation
- Pelvic MRI
- Other imaging or laboratory testing
The next step depends on the specific finding.
A small simple ovarian cyst and a complex adnexal mass should not be managed in the same way.
Likewise, mild prostate enlargement without urinary symptoms is different from significant urinary retention or an abnormal PSA result.
What to Ask When Booking
Before booking, ask:
- Is the examination transabdominal or transvaginal?
- Which pelvic organs are included?
- For women, are both the uterus and ovaries evaluated?
- For men, are the prostate and bladder evaluated?
- Do I need a full bladder?
- How much water should I drink?
- When should I stop urinating before the examination?
- Is the examination already included in my package?
- Is an English report available?
- Can previous imaging be compared?
Women with a known gynecologic condition should also ask whether a screening transabdominal examination is sufficient or whether a dedicated gynecologic ultrasound would be more appropriate.
Tips for Foreigners
Bring previous pelvic ultrasound, gynecologic ultrasound, CT, or MRI reports if available.
This is particularly useful if you have previously been told that you have:
- Uterine fibroids
- Adenomyosis
- Ovarian cysts
- An adnexal mass
- Endometrial abnormalities
- Prostate enlargement
- Other pelvic lesions
For women, check whether the previous examination was transabdominal or transvaginal.
A previous transvaginal examination may provide substantially more detailed information about the uterus, endometrium, and ovaries than a new transabdominal screening examination, so measurements and findings should be compared with the examination technique in mind.
Also pay attention to phrases such as:
- Ovary not visualized
- Limited visualization
- Suboptimal examination
These phrases do not mean that the organ has been proven normal.
Final Thoughts
Transabdominal pelvic ultrasound is a simple and practical examination available in many Korean health screening programs.
In women, it can provide an overview of:
- Uterus
- Fibroids
- Ovaries when visible
- Larger pelvic abnormalities
In men, it may provide useful information about:
- Prostate size
- Bladder
- Urinary retention
- Gross lower urinary tract abnormalities
Its main limitation in women is that the uterus, endometrium, and particularly the ovaries can often be evaluated in greater detail with transvaginal ultrasound.
Some Korean health screening centers offer transvaginal ultrasound directly, while others offer only transabdominal screening and refer patients for gynecologic evaluation when necessary.
The menstrual cycle can affect the appearance of the endometrium and ovaries, but a routine screening ultrasound usually does not need to be scheduled on a specific cycle day.
Transvaginal ultrasound should also be performed only when appropriate and with the patient’s consent. If vaginal insertion is not desired or appropriate, transabdominal ultrasound or another imaging method may be used instead.
Neither pelvic ultrasound nor transabdominal prostate ultrasound should be treated as a stand-alone cancer screening test.
The value of pelvic ultrasound comes from understanding which approach was used, which organs were adequately visualized, and when a more focused gynecologic, urologic, or MRI examination is needed.
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