Diagnostic ultrasound is a non-invasive diagnostic technique that uses high-frequency sound waves to visualize internal organs and soft tissues in real time. In gynaecology and obstetrics, this method is used, among other reasons, because there are no risks or side effects associated with it. Ultrasound is used to examine the organs of the small pelvis and their vascular supply. In gynaecology, we generally use a so-called vaginal probe. A transabdominal probe is mainly used in obstetrics.