Before the ultrasonogram, you are told not to eat for a certain period of time , or to drink more water. In this case , it should be noted that the doctor concerned has told the patient not to eat for a long time. Being told not to eat means that you can eat something at all. But no. Being told not to eat means not eating at all. If you eat anything light , and gas is somehow produced in the stomach , it can lead to complications. When it comes to drinking water , you have to drink water , not juice or any other liquid food. In short , before having an ultrasonogram, the patient has to have a full stomach or an empty stomach , a full bladder or an empty bladder. If necessary, it may be necessary to have an ultrasonogram again on an empty stomach overnight. All you have to do is listen to the doctor clearly beforehand. So that no problem is created by going on time. One more thing to keep in mind when having an ultrasonogram is your dress. It is best to wear comfortable and cotton clothing when having an ultrasonogram.