Transvaginal ultrasound is one of the most valuable tools for women’s health: a dynamic examination that allows for real-time observation of what is happening inside the body.

But what makes this procedure so special and, at the same time, so dependent on the skill of the practitioner? Understanding the technical aspects of this examination and the role of new technologies in gynecological prevention is essential for approaching the diagnostic process with full awareness and peace of mind.

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What is a transvaginal ultrasound and what does it show?

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A transvaginal ultrasound is a non-invasive diagnostic test and the gold standard for women’s health screening and monitoring.

Unlike an external pelvic ultrasound, it uses a probe inserted into the vaginal canal to closely examine the uterus, ovaries, fallopian tubes, and the entire reproductive system.

Usually performed during a gynecological exam, it can be two-dimensional or three-dimensional, and its effectiveness lies in its ability to provide detailed images of internal organs and surrounding structures, such as the bladder, ureters, rectum, and sigmoid colon, offering the doctor a close-up view essential for monitoring the patient’s well-being or promptly identifying any abnormalities.

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How an internal gynecological exam works

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The exam uses ultrasound: the transducer emits high-frequency sound waves, which are harmless and imperceptible, that are reflected by the tissues, captured by the probe, and converted into dynamic images on the monitor.

Given its safe and non-invasive nature, transvaginal ultrasound does not require any special preparation and can be performed on sexually active women even during their menstrual cycle. Women who have not yet had sexual intercourse, on the other hand, undergo a transabdominal ultrasound with a full bladder.

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The dynamic, real-time nature of the exam‍

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Now that we’ve clarified the technical aspects of ultrasound, there’s one aspect that completely changes the perspective: unlike X-rays or CT scans, ultrasound does not produce a static “snapshot.” It is, in fact, a dynamic examination that, performed in real time, allows the doctor to explore the entire pelvic area by moving the transducer.

However, this “navigation” is not always without obstacles. There are, in fact, external factors that can affect the quality and accuracy of ultrasound images. Consider, for example, the presence of air in the intestinal loops, a potentially significant thickness of adipose tissue, and the patient’s body conformation.  

Finally, let’s not forget that ultrasound is a highly operator-dependent examination, where the ability to correctly “interpret” the images despite interference and capture the perfect angle depends not only on the biomedical equipment but, above all, on the operator’s sensitivity and experience.

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Conclusions

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Transvaginal ultrasound is, therefore, much more than just a routine examination: it is an ongoing dialogue between technology, expertise, and patient care. The quality of this examination depends not only on the equipment used, but also on the operator’s ability to interpret each image with precision and sensitivity, transforming complex data into valuable information for the patient’s health.

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Sources

https://www.humanitas.it/news/ecografia-transvaginale-come-funziona-e-perche-e-importante/ , Last Accessed May 5, 2026

https://www.airc.it/cancro/affronta-la-malattia/guida-agli-esami/ecografia-transvaginale  , Last Accessed May 5, 2026

ReckerF, Gembruch U, Strizek B. Clinical Ultrasound Applications in Obstetrics andGynecology in the Year 2024. Journal of Clinical Medicine. 2024; 13(5):1244. https://doi.org/10.3390/jcm13051244

L’AttoMedico Ecografico dello Specialista in Radiodiagnostica a cura di L. Brunese,A. Fileni, O. Tamburrini, SOCIETÀ ITALIANA di RADIOLOGIA MEDICA

Smereczyński,A., & Kołaczyk, K. (2018). Pitfalls in ultrasound imaging of the stomachand the intestines. Journal of ultrasonography, 18(74), 207–211.https://doi.org/10.15557/JoU.2018.0031

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