It is noninvasive diagnostics, using physical phenomenon of reflection and absorption of acoustic waves at the divides of environments with different density. In gynecology and obstetrics, this method is also used due to the lack of risks and adverse effects.

Using the ultrasound diagnostics, we examine the organs of small pelvis, and other vascular supply. By default, we use the so-called vaginal probe in gynecology. If the vaginal examination is not possible, it is possible to use an examination via the abdominal wall (trans-abdominal).