The patient must present with a full bladder. 1  2hrs prior to the appointment, the patient should empty their bladder. 2  Over the next hour they should drink at least 1 litre of water. This allows time for the water to reach the bladder. 3  Do not go to the toilet until instructed by the Sonographer.
It is important to get the Rhogam shot if you are a negative blood type and your significant other is a postive. Negatuve blood type is a recessive trait, therefore its highly likely your baby will have a postivie blood type. A negative blood type means your blood cells lack a protien coating.
If youâre RH-negative, you get RhoGAM: 1  At about 28 weeks of pregnancy. 2  Within 72 hours after the birth if your baby is Rh-positive or if his Rh is unknown. 3  After any situation in which your blood and your babyâs blood may mix, like amnio or CVS, miscarriage, ectopic pregnancy or a hit to your belly.