Is it tru a half to have a full blader to have my first ultrasound?

A full bladder is usually necessary when the scan is done abdominally and in the early part of pregnancy. This would entail drinking 4 cups of water. This would tend to lift the uterus up a little bit and being in front displaces the bowels away and act as an echo-lucent windows for the ultrasound to p through. Ultrasound doesn't go through air (as in the bowels) well but transmits perfectly through liquid (as in the case of the urine in the bladder). Your doctor will be able to see things so much more clearly with the full bladder there especially the presence or absence of fetal heart beat. In a l scan however, a full bladder will not be necessary.