During pregnancy, a woman's immune system may develop antibodies against the Rh factor in her baby's blood. This is called Rh sensitization and can lead to serious health problems for the baby. If you are Rh-negative, your healthcare provider will test you for Rh sensitization during your first prenatal visit. If you are sensitized, you will need special care throughout your pregnancy.
It is important to follow your healthcare provider's recommendations for maternal care if you have anti-D [Rh] antibodies. This will help ensure the best possible outcome for you and your baby.