Ectopic pregnancy, medically known as ectopic pregnancy, is when a fertilized egg lays outside the body cavity of the uterus. What we usually refer to as ectopic pregnancy is tubal pregnancy. The determination of ectopic pregnancy can be based on its clinical manifestations and relevant auxiliary examinations, such as ultrasonography. Clinical manifestations of ectopic pregnancy: abdominal pain and vaginal bleeding after menopause are typical symptoms. When a fertile woman with normal sex life has unexplained abdominal pain after menopause with vaginal bleeding, she should seek medical attention immediately. If the ectopic pregnancy is long and rupture bleeding has occurred, it may manifest as syncope and shock, and a mass can be found in one side of the abdomen in the fallopian tube area, with obvious lower abdominal pressure pain and rebound pain, etc. 2. Ancillary tests for ectopic pregnancy: blood HCG, vaginal ultrasound, posterior vaginal fornix aspiration, laparoscopy, etc. Blood HCG and vaginal ultrasound are important methods for early diagnosis of ectopic pregnancy, and they are often combined to confirm the diagnosis in clinical practice: if the blood HCG is positive and the measurement value is low, and the vaginal ultrasound indicates that the uterine cavity is empty, a mass is detected in one of the fallopian tubes, and fetal buds and primitive ventricular pulsation can be detected in it, ectopic pregnancy can be confirmed. The level of blood HCG measurement is useful in assessing the choice of conservative chemotherapy or surgical treatment options. When patients with severe abdominal pain, suspected rupture of ectopic pregnancy and intra-abdominal bleeding are admitted to the hospital in an emergency, posterior vaginal fornix aspiration is feasible and can be diagnosed if dark red non-clotting blood is obtained, which is a simple and reliable diagnostic method. Laparoscopy is currently a higher level of examination and is considered the gold standard for the diagnosis of ectopic pregnancy. It can be effective and fast in treating ectopic pregnancy while confirming the diagnosis. It is worth noting that not all patients with ectopic pregnancy have the above-mentioned obvious clinical manifestations. When the above symptoms or signs appear, they generally indicate that the ectopic pregnancy is at a more dangerous stage and attention should be paid to prevent rupture of the ectopic pregnancy. This reflects the importance of auxiliary tests for ectopic pregnancy to help confirm the early diagnosis.