Pelvic Ultrasound for Women’s Health: What Can It Detect

A pelvic ultrasound is a safe, routine part of women’s health care in Singapore, used every day to help doctors understand what is happening inside the pelvis. This guide explains what the scan involves, what it can detect, and what you can expect at your appointment.

What Is a Pelvic Ultrasound?

A pelvic ultrasound is a non-invasive imaging scan that uses sound waves, not radiation, to produce real-time pictures of the uterus (womb), ovaries, fallopian tubes, and surrounding pelvic structures. Because it does not involve radiation, it is considered safe for women of all ages, including those who are pregnant.

There are two main types of pelvic ultrasound, and your doctor may recommend one or both depending on your situation.

Transabdominal Ultrasound

During a transabdominal ultrasound, a smooth handheld device called a transducer is gently moved across the skin of your lower abdomen. A small amount of gel is applied first to help conduct the sound waves. This type of scan provides a broad view of the pelvic area and is typically the first approach used. You will usually be asked to attend with a full bladder, as this helps push the bowel aside and may improve image clarity.

Transvaginal Ultrasound

A transvaginal ultrasound uses a slender probe that is gently inserted into the vagina. This approach may produce clearer, more detailed images of the uterus and ovaries because the probe is positioned closer to these structures. Many women feel mild pressure during the scan, but it is generally well tolerated. Your doctor will explain the reason for recommending this type and will always seek your consent beforehand.

Why Do Doctors Recommend a Pelvic Ultrasound?

If your doctor has suggested a pelvic ultrasound, it does not automatically mean something is seriously wrong.

Investigating Symptoms

Your doctor may suggest a pelvic ultrasound to investigate symptoms such as:

• Irregular, heavy, or prolonged menstrual periods
• Pelvic pain or pressure, whether constant or intermittent
• Unusual vaginal bleeding, including bleeding between periods or after menopause
• Difficulty conceiving
• A sensation of fullness or heaviness in the lower abdomen
• Frequent urination or changes in bladder function

These symptoms can have a range of causes, many of which are benign (non-harmful). A pelvic ultrasound helps your doctor identify the source so that appropriate care can be planned.

Routine Screening and Health Checks

Not every pelvic ultrasound is prompted by a specific symptom. Some women have the scan as part of a routine gynaecological check-up, particularly if they have a known condition such as fibroids or ovarian cysts that requires periodic monitoring. For women with a family history of ovarian or uterine conditions, your doctor may recommend periodic scans as part of an ongoing approach to your health.

What Can a Pelvic Ultrasound Detect?

A pelvic ultrasound can identify a wide range of conditions affecting the uterus, ovaries, and surrounding pelvic structures, and is commonly used as a first-line tool in gynaecological care.

Uterine Conditions (Fibroids, Adenomyosis, Polyps)

• Fibroids: These are non-cancerous (benign) growths that develop within or on the wall of the womb. They are common and many women have no symptoms at all, though some experience heavy periods or pelvic discomfort.
• Adenomyosis: This is a condition where the tissue that normally lines the inside of the womb grows into the muscular wall of the womb itself. It can cause heavy, painful periods and a feeling of pressure in the pelvis.
• Uterine polyps: These are small, soft growths on the inner lining of the womb. They can cause irregular bleeding and, in some cases, may affect fertility.

Ovarian Conditions (Cysts, Polycystic Ovaries, Masses)

• Ovarian cysts: These are fluid-filled sacs that form on or within an ovary. Many are harmless and resolve on their own, though some require monitoring or treatment.
• Polyendocrine Metabolic Ovarian Syndrome (PMOS): Ultrasound can reveal a characteristic pattern of multiple small follicles (fluid-filled sacs containing eggs) arranged around the edge of the ovary, which is associated with PMOS (formerly known as PCOS).
• Ovarian masses: A pelvic ultrasound can detect unusual growths on the ovaries. Further investigation is needed to determine the nature of any mass identified.

Endometriosis and Pelvic Adhesions

Endometriosis is a condition where tissue similar to the womb lining grows outside the womb, often on the ovaries, fallopian tubes, or nearby pelvic structures. It can cause painful periods, pelvic pain, and fertility difficulties. While a definitive diagnosis of endometriosis requires a surgical procedure (laparoscopy, or keyhole surgery), ultrasound can identify certain features associated with the condition, such as endometriomas (ovarian cysts caused by endometriosis) and signs of pelvic adhesions (bands of scar tissue that can cause organs to stick together).

Pelvic Organ Prolapse and Pelvic Floor Concerns

Pelvic organ prolapse refers to the slipping down of one or more pelvic organs, such as the bladder, womb, or bowel, into or towards the vaginal canal. This occurs when the pelvic floor muscles and supporting tissues become weakened. Ultrasound, particularly a specialised pelvic floor ultrasound, can assess the position of pelvic organs and the function of the pelvic floor muscles, helping to guide management for symptoms such as a sensation of heaviness, pressure, or accidental bladder leakage (urinary incontinence).

Early Pregnancy Confirmation and Monitoring

A pelvic ultrasound is often performed in early pregnancy. It can confirm that a pregnancy is developing within the womb, estimate gestational age, detect a foetal heartbeat, and identify potential concerns such as an ectopic pregnancy (a pregnancy that develops outside the womb, most commonly in a fallopian tube), which requires prompt medical attention.

Summary Table: Common Conditions Detectable by Pelvic Ultrasound

How Pelvic Ultrasound Supports Fertility and Pregnancy Care

For women who are trying to conceive or have recently discovered they are pregnant, a pelvic ultrasound is a useful tool in clinical assessment.

When assessing fertility, ultrasound can evaluate the ovaries for signs of ovarian reserve (an indicator of the number and quality of eggs remaining), monitor the development of follicles during a menstrual cycle, and check for structural factors that might affect conception, such as fibroids or polyps within the womb cavity.

In early pregnancy, ultrasound can confirm that the pregnancy is located within the womb and assess how it is developing. It can detect a foetal heartbeat, estimate how many weeks along you are, and identify a multiple pregnancy (such as twins) at an early stage. It also plays a key role in identifying ectopic pregnancy, which is important for your safety.

If you are on a fertility treatment programme, your doctor may use serial ultrasound scans (a series of scans over time) to monitor how your ovaries are responding to treatment.

What to Expect During a Pelvic Ultrasound in Singapore

A pelvic ultrasound is straightforward and typically completed within 15 to 30 minutes.

Before the Scan

• If you are having a transabdominal ultrasound, you will usually be asked to drink water beforehand and attend with a comfortably full bladder.
• If you are having a transvaginal ultrasound, an empty bladder is often preferred.
• Your doctor or the clinic will advise you in advance, so follow the specific instructions you receive.
• Wear comfortable, loose-fitting clothing as you may need to expose your lower abdomen.
• Bring a list of your current symptoms, medications, and any questions you would like to ask.

During the Scan

• For a transabdominal scan, you will lie on your back on an examination table. A small amount of warm gel is applied to your lower abdomen, and the sonographer (the person performing the scan) gently moves the transducer across the skin.
• For a transvaginal scan, you will be asked to undress from the waist down and lie on the examination table. A slim probe, covered with a protective sheath and gel, is gently inserted into the vagina. You may feel mild pressure, but the procedure is generally well tolerated.
• The sonographer will capture images of your pelvic structures. You may be able to see the screen, and some clinics will explain what they are viewing as they go.

After the Scan

• The gel is wiped away and you can dress immediately after the scan.
• You can resume normal activities right away.
• The images will be reviewed by a specialist, who will discuss the findings with you, either at the same appointment or at a follow-up consultation.
• If anything requires further investigation, your doctor will explain the next steps clearly.

Quick Tips for Your Pelvic Ultrasound Appointment

• Drink water beforehand if you are having a transabdominal scan. Aim for a comfortably full, not uncomfortably bursting, bladder.
• Wear comfortable, easy-to-remove clothing to make undressing and redressing simpler.
• Write down your symptoms and questions before you arrive, so you do not forget anything important during the appointment.
• Let the sonographer know if you feel any discomfort at any point during the scan.

How Often Should Women Have a Pelvic Ultrasound?

How often you may benefit from a pelvic ultrasound depends on your age, symptoms, medical history, and any known conditions.

Women with no symptoms and no known pelvic conditions do not necessarily require routine pelvic ultrasounds as a standard part of annual screening. However, a pelvic ultrasound may be included in your gynaecological check-up if your doctor considers it appropriate for your individual situation.

Women who have been diagnosed with fibroids, ovarian cysts, endometriosis, or other pelvic conditions may benefit from periodic scans to monitor any changes over time. The frequency of these follow-up scans will be guided by the nature of the condition and your doctor’s clinical judgement.

If you develop new or worsening symptoms at any point, you may wish to speak with your doctor rather than waiting for a scheduled review. Monitoring guided by a specialist can help support timely identification and management of any changes.

When to Seek Professional Help

You may wish to consult a gynaecologist if you experience any of the following:

• Persistent or recurring pelvic pain, even if it feels mild
• Heavy, prolonged, or irregular menstrual periods
• Bleeding between periods or after sexual intercourse
• Bleeding after menopause (any post-menopausal bleeding warrants assessment)
• Difficulty conceiving after 12 months of trying (or after six months if you are over 35)
• A feeling of heaviness, pressure, or a bulge in the vaginal area
• Accidental bladder leakage or a noticeable change in bladder or bowel function
• A positive pregnancy test, particularly if accompanied by pelvic pain or bleeding

Seeking help early does not mean the situation is serious. In many cases, early assessment allows for simpler, more straightforward management.

Commonly Asked Questions

Is a pelvic ultrasound painful?

A transabdominal ultrasound is generally painless. You may feel mild pressure as the transducer moves across your abdomen. A transvaginal ultrasound may cause a sensation of mild pressure or slight discomfort when the probe is inserted, but most women find it well tolerated. If you feel uncomfortable at any point, let the sonographer know.

Can a pelvic ultrasound detect cancer?

A pelvic ultrasound can identify abnormal masses, unusual growths, or structural changes in the pelvic organs that may warrant further investigation. However, ultrasound alone cannot confirm a diagnosis of cancer. If a suspicious finding is identified, a doctor may recommend further tests, such as blood tests or a tissue biopsy (a small sample taken for laboratory analysis), to determine the nature of the abnormality.

How long does a pelvic ultrasound take?

A pelvic ultrasound typically takes between 15 and 30 minutes from start to finish. The exact duration may vary depending on what needs to be assessed.

Do I need a referral for a pelvic ultrasound in Singapore?

In Singapore, women can often book directly with a gynaecologist at a specialist clinic without a prior referral. It is worth checking with the clinic directly before your appointment to understand the process that applies to your situation.

What is the difference between a pelvic ultrasound and a Pap smear?

These are two distinct assessments that serve different purposes. A pelvic ultrasound uses sound waves to produce images of the internal pelvic organs, such as the uterus and ovaries. A Pap smear (also called a cervical smear) is a separate procedure that collects cells from the cervix (the lower part of the womb) to screen for abnormal cell changes that could indicate a risk of cervical cancer. Both are components of women’s health care, but they examine different things and cannot substitute for one another.

Next Steps

If you have been recommended for a pelvic ultrasound, or if you have symptoms that you have not yet discussed with a doctor, you may wish to book a consultation with a gynaecologist. Bringing a written list of your symptoms, the dates they started, and any questions you have may help you make the most of your appointment.

Learn More About Pelvic Ultrasound and Women’s Health

If you would like to understand what a pelvic ultrasound might reveal for your individual situation, speaking with a specialist may be a helpful first step. A gynaecologist gives you the opportunity to ask questions, discuss your symptoms, and receive guidance tailored to your health history and needs.