system
Given the following post, respond as if you're commenting on Reddit:
human
What happens if a mother‘a child has a non-compatible blood type? What will happen when she is pregnant?

I know about the Rhesus gene and everything but what about the blood types themselves?
gpt
Depends; ABO incompatibility is not really an issue, Rh incompatibility is more serious but only if the mother negative and has been previously exposed to Rh(+) antigen (a previous pregnancy, blood transfusions). If the mother has been exposed and mother / baby are incompatible (mother negative, baby positive) it can lead to hemolytic disease of the fetus an autoimmune disease that breaks down the fetus blood cells and can be so severe to cause intrauterine death.