What sorts of problems might a person with an autoimmune disease run into with pregnancy?

No, I’m not pregnant! XD

While surfing this thread the other day I learned that women’s immune systems are naturally suppressed while pregnant to avoid having the body reject the fetus. I never knew that that was a possibility. It made me wonder, as someone with a hyper-vigilant immune system, if that would be a big threat I would face if I wanted to have children one day.

That is the main thing I am wondering about, but if you want to contribute other possible issues, that’s welcome too.