The inability to determine whether it is an ectopic pregnancy is a common clinical situation because the early diagnosis of ectopic pregnancy is not yet solved, and it is usually diagnosed only on the 40-50th day of pregnancy, or when the patient has obvious symptoms of abdominal pain and bleeding. When it cannot be clarified in the early stage, it can only continue to be observed, and the observation indicators include blood HCG level, progesterone level, and ultrasound changes. If the blood HCG level does not double normally and the ultrasound suggests a mass in the adnexa, the possibility of ectopic pregnancy is higher. Therefore, when there are no obvious symptoms in the early stage, the only way to determine whether there is an ectopic pregnancy is to monitor the blood HCG level and ultrasound. Although ectopic pregnancy cannot be determined through preliminary examination, if the risk of ectopic pregnancy is considered to be high, hospitalization and observation can be done to avoid critical situations. If the risk is not high, you can have regular outpatient follow-up and go to the emergency room as soon as possible in the event of an ectopic pregnancy.