It is possible to have an ultrasound at 5 weeks of pregnancy, but at this time you may only see the gestational sac, but not the germ or the heartbeat. Normally, it is around 8 weeks of pregnancy, when you can see the gestational sac, the fetal heartbeat and the fetal buds. After pregnancy, blood tests for HCG, progesterone and estradiol can be taken to understand the quality of the embryo, and whether the pregnancy is intrauterine or ectopic can be seen on ultrasound at around 5 weeks of gestation. If the gestational sac is not seen in the uterus but is seen anywhere else outside the uterus, you should be alert to the possibility of ectopic pregnancy, which should be judged together with the HCG status and progesterone level. If a gestational sac is seen in the uterine cavity, at this time, due to the early stage, the fetal bud and fetal heartbeat cannot be seen yet, it is recommended to review the pregnancy after one week. The ultrasound can be done after 5 weeks of pregnancy if you have regular menstruation, and it can clarify whether the pregnancy is intrauterine or ectopic. However, because it is early, it may not be able to respond well to other conditions, so it is recommended to perform ultrasound at 8 weeks of pregnancy to get a comprehensive understanding of whether the pregnancy is intrauterine and the number of fetuses, and to evaluate the gestational week.