Diagnostic Hysteroscopy vs Transvaginal Ultrasound

Transvaginal ultrasound is an imaging test performed with a slim probe placed in the vagina. It creates pictures of the uterus, womb lining, ovaries and nearby pelvic structures. Diagnostic hysteroscopy uses a narrow camera passed through the vagina and cervix to inspect the uterine cavity directly. The choice depends on whether the main question concerns the wider pelvis or the inside surface of the womb.

Transvaginal ultrasound uses sound waves to survey pelvic organs, while diagnostic hysteroscopy views the inside of the uterus directly.

Diagnostic hysteroscopy may be considered when bleeding or an earlier scan raises a question about the uterine cavity, such as a polyp, a fibroid projecting into the cavity, or an irregular lining. Because the camera sees the cavity directly, the clinician can focus on a specific area and may take a tissue sample. The procedure may be especially useful when a scan does not explain ongoing symptoms or when a cavity finding needs closer assessment.

Transvaginal ultrasound may be considered as an initial assessment of pelvic pain, unusual bleeding, fertility concerns or suspected ovarian and uterine changes. It can examine more than the uterine cavity and does not require a camera to pass through the cervix. The images can help determine whether further assessment should focus on the lining, a pelvic organ, or another cause of symptoms.

Ultrasound usually causes pressure and may feel uncomfortable, particularly when the pelvis is tender. Hysteroscopy can cause cramping, and some people have light bleeding afterwards. Passing an instrument through the cervix carries procedural risks such as infection, bleeding or a small injury to the uterus, although the clinician will discuss how these apply to you. Tell the team about pregnancy possibility, infection symptoms, heavy bleeding, allergies and medicines that affect bleeding before either test.

Neither test answers every pelvic-health question. A clinician may recommend blood tests, a different scan, endometrial sampling, or follow-up assessment when the symptoms do not match the first result. Severe pain, fainting, fever, or heavy bleeding needs prompt medical attention rather than waiting for a routine comparison of tests. The next step should address the unresolved clinical question, not simply repeat an examination.

A clinician considers your symptoms, age and reproductive plans, examination findings, pregnancy possibility, previous results and whether a tissue sample may be needed. They also weigh how quickly an answer is needed, whether the suspected issue lies inside the uterine cavity, and your preference about an internal procedure. Read more about [Diagnostic Hysteroscopy](/treatments/diagnostics-and-imaging/diagnostic-hysteroscopy/) and [Transvaginal Ultrasound](/treatments/diagnostics-and-imaging/transvaginal-ultrasound/) before discussing the plan.