Anyone know what is a transvaginal ultrasound?

Different probe: Pelvic ultrasound can be performed over the lower abdomen. However, there is also a vaginal "probe" which can be inserted into the outer vagina (about an inch). It is smaller than the regular ultrasound transducer/scanner. This allows for much better imaging of the female pelvis (uterus/ovaries). It is very commonly done; it should not be painful.