The distinction between ectopic pregnancy and biochemical pregnancy relies mainly on symptoms and related auxiliary tests. The first point is that the common symptoms of ectopic pregnancy are menopause and abdominal pain as well as vaginal bleeding and abdominal pain, which are characterized by discomfort or soreness on one side until the ectopic pregnancy miscarries or ruptures. In the event of miscarriage or rupture, the pain is severe and tearing on one side of the lower abdomen and may be accompanied by shocking changes, such as decreased blood pressure, clammy and cold, pale face, and fine pulse. In contrast, in biochemical pregnancy, there are symptoms of menopause and vaginal bleeding, but there is no obvious lower abdominal pain and no symptoms of shock. The second point is that in ectopic pregnancy, the uterine cavity is empty and heterogeneous echogenicity can be seen outside the uterus, whereas in biochemical pregnancy history, no specific imaging can be seen outside the uterus.