Main Content
Top of the page
Rh sensitization happens if you have Rh-negative blood and are exposed to Rh-positive blood. Because the blood types don't match, you can develop antibodies against the Rh-positive blood. If you are pregnant, you can become sensitized if your baby has Rh-positive blood. Exposure to your baby's blood happens most often during delivery. This often isn't a problem in the first pregnancy. But if you get pregnant again with an Rh-positive baby, antibodies in your blood can attack the baby's blood cells and cause serious problems.
A blood test is the only way to know you have Rh sensitization or are at risk for it.
Current as of: November 9, 2022
Author: Healthwise Staff
Medical Review:Sarah Marshall MD - Family Medicine & Adam Husney MD - Family Medicine & Kirtly Jones MD - Obstetrics and Gynecology & JoLynn Montgomery PA - Family Medicine
This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.