ABSTRACT
Ectopic pregnancy is one of the most common acute abdominal diseases in gynecology. A ruptured ectopic pregnancy can lead to hemorrhagic shock, which is life-threatening. Therefore, early diagnosis and early treatment are extremely critical for preserving fertility and achieving good prognosis in patients with ectopic pregnancy. The available diagnostic methods of ectopic pregnancy include laboratory tests such as progesterone test, human chorionic gonadotropin test and ultrasound examination. Ultrasound examination can help determine the location of uterine and adnexal masses, gestational sacs, and germ, all of which are directly related to the final diagnosis regarding ectopic pregnancy. Ultrasound examination includes abdominal ultrasound and transvaginal ultrasound. Transvaginal ultrasound accesses to the focal tissue closer than abdominal ultrasound, and it does not require a full bladder. These advantages make clinical practice of transvaginal ultrasound easier for both physicians and patients. However, application of transvaginal ultrasound in the diagnosis of ectopic pregnancy requires further investigation to guide the early diagnosis and treatment of ectopic pregnancy. .