Ultrasound can detect ectopic pregnancy within a certain range, but it is also not completely diagnostic because the site of implantation cannot be clearly displayed. If the bladder is not fully filled, the ultrasound may not show clearly, and vaginal ultrasound, combined with abdominal ultrasound, should be chosen for the examination. If ectopic pregnancy is diagnosed by ultrasound, it may also be due to rupture of the corpus luteum produced during pregnancy and should also be combined with HCG tests and postoperative tissue testing for a definitive diagnosis. If the ultrasound is not abnormal and the HCG suggests pregnancy, it should be repeated again to exclude whether the pregnancy is ectopic or has conceived normally but no gestational sac has formed in the uterine cavity. In addition, if abdominal pain or sudden discomfort occurs, you should go to the hospital in time to avoid rupture of ectopic pregnancy.