Which ultrasound is more accurate transvaginal or pelvic?

See answer. They are usually complementary. Endovaginal us usually give an improved view of the endometrial stripe, ovaries, and uterine parenchyma. Trans-abdominal us shows a more comprehensive “overview” of the entire uterus and it’s relationship to the bladder and pelvis and may identify ovaries that are more widely positioned.
Transvaginal. The transnational probe gives much higher resolution images of the uterus and ovaries. This has to do with the higher frequency of the probe and closeness to the cervix, giving better pictures than through the pelvis.