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 both of you are negative (O-, A-, B-AB-), then your baby will have a negative blood type too. If both of you are positive, then your baby will be positive too. But, if you're negative and your partner is positive, your baby will have a positive rhesus factor and your body might work to reject the baby.