The question is unclear, but I think you are asking about the issues between blood type differences during pregnancy. If the blood types or RH factors are different between the mother and the child, the mother will have to get shots to prevent her body from rejecting the baby. The mother's body will think that she has a foreign object inside and will try to push it out, which will cause a miscarriage. That happened to my neighbor and now she has a beautiful little girl.
