If pregnancy is indicated by the presence of two distinct bars on an early pregnancy test, the chances of not being pregnant in this case are almost non-existent. So where exactly is the pregnancy, whether it is intrauterine or extrauterine, in addition to whether it is a gravid tumor, need to do further examination. If there are two bars, and no gestational sac is visible at this point in the ultrasound examination, then it is possible that the pregnancy is relatively short. Then the fertilized egg has just entered the uterine cavity and settled, so at this time through the ultrasound can not be detected, it is recommended that you can interval a few days to do another examination, or every other day to draw blood to check the blood HCG, to understand whether the blood HCG doubled up, if it doubled up in the uterus the possibility of pregnancy is very high. If it doesn’t double but only rises a little bit, then we should be highly alert to ectopic pregnancy, for this kind of patients are recommended to be hospitalized for observation.