Ectopic pregnancy refers to the implantation of a fertilized egg outside the uterine cavity, commonly known as ectopic pregnancy. An ectopic pregnancy is when the pregnancy sac implants outside the uterine cavity. Because the muscle layer outside the uterine cavity is very thin, it restricts the growth of the pregnancy sac during its development. Furthermore, the trophoblast invades the local blood vessels, causing the vessels to rupture and miscarriage to occur very early in the pregnancy, potentially endangering the patient's life. Therefore, an ectopic pregnancy is an abnormal pregnancy that cannot be sustained. If an ectopic pregnancy is detected, it should be treated as early as possible.