When an ultrasound is done in the 8th month of pregnancy, there may be two different scenarios because the position of the embryo is different when examined at different time periods and the results may change, but the development of the fetus does not change. The position of the embryo may not be the same at different time periods, so the two diagnoses may not be the same by ultrasound. And the clarity of the examination may be affected by the different positions of the fetus at different time periods, but fetal development does not change in a short period of time. If the results of the first ultrasound examination are not clear or important parts are not found, you can take the 2nd ultrasound examination at an interval. You can change the position of the embryo by walking or going up and down the stairs before the examination. If you are worried about poor embryo development or afraid of wrong diagnosis, you should go to the hospital for regular obstetric examination including fetal heartbeat monitoring, etc. You can analyze the development of the fetus according to the relevant examination.