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.
Women are most likely to be exposed to the fetusâ blood during the last three months of pregnancy and at delivery. Therefore, during pregnancy women are usually given a dose of RhoGAMÂ® at approximately 28 weeks gestation and then receive another dose within 72 hours of birth, if the baby has an Rh- positive blood type.