Do not concern and stay relaxed.
It is perfectly safe for you and your baby if you have the anti-D injection.
All
rhesus negative mothers are advised to have an anti-D injection between 28 weeks and 30 weeks of
pregnancy. This is because it is likely small amounts of blood from your baby will pass into your blood during third trimester.
Regarding the second injection, after giving birth, a sample of your baby's blood will be taken from the
umbilical cord.
If your baby is RhD positive, and you have not already been sensitised, you will be offered second injection of anti-D immunoglobulin within 72 hours of giving birth.
The injection will destroy any RhD-positive blood cells that may have crossed over into your bloodstream during the delivery.
This means your blood will not have a chance to produce
antibodies and will significantly decrease the risk of your next baby having rhesus disease.
Hope now you are clear regarding your concern.
Take care.