When I was pregnant, the doc had to give me a shot so that my body wouldnt attack the fetus. This is because my blood is rh- type. So if baby was rh+ then my body would see it as foriegn and it would attack it. Sounds like our immune system.
I was just wondering if it is common in fibro, or people with autoimmune issues. I tried to google it but all I can get is stuff about being descendant of ancient aliens .