Ectopic pregnancy, also known as extrauterine pregnancy, refers to the implantation of the gestational sac outside the uterine cavity. For example, in the fallopian tubes, ovaries, or the cornual region, etc., leading to a series of symptoms known as ectopic pregnancy. Typically, symptoms of an ectopic pregnancy include a history of amenorrhea, where most individuals have a long or short history of missed periods. The second symptom is bleeding, which can be irregular, minor vaginal bleeding or significant bleeding, as well as bleeding within the abdominal cavity, which can lead to hemorrhagic shock in severe cases. Additionally, abdominal pain may occur, manifesting as sudden, tearing-like lower abdominal pain, or irregular referred pain.