How to hold your urine for an ultrasound is the fastest and should be done to find out how much water to drink and how long it will take to produce enough urine for the ultrasound. It is generally recommended to drink plenty of water up to half an hour before the ultrasound. Usually, if you drink a lot of water consistently, then urine will be formed in half an hour’s time. At the time when there is a deeper feeling of urine, it is time to go for an ultrasound. Usually in the case of urinary system it is necessary to hold the urine, after holding the urine the bladder fills up and is able to see the structures in the bladder cavity more clearly. In the case of a gynecological examination, a full bladder pushes the bowel upwards and removes the interference of the bowel making the images of the uterus and its attachments appear more clearly. Therefore, after successfully booking an ultrasound appointment, patients should drink plenty of water half an hour beforehand until they feel the urge to urinate and go for the examination.