Flying High Now, I think I know what you are talking about.
For those of us whom are rh negative, even if we are (for example) transfused with blood of the same type, but of the RH Positive type, we develop a permanent immune reaction, that is worse for women than it is for men.
Oddly enough, as rh negative persons, we can give to RH Positive persons, without problem; vice-versa, we're in trouble. Same blood type, and of course, no agglutination, but it can cause a very peculiar reaction, and with women, an immune response that is scary if they should consider having children.
It's good to know your blood type, anyways.
You don't want a transfusion: fine. But if you are considering a family, you SHOULD find this out ahead of time. Yes, it is very important.
It's neat to find out, and when you have an opportunity, check out the countless websites on-line about blood types, world wide distribution and frequency within various regions.
The RH factor is found among approximately 85% of the world population.
Thanks for sharing that information FHN. I'm saddened to read that because of previous mix-ups many years ago, as a result because of the blood sensitivity, it has affected your children.
Blood typing: Extremely important, I cannot stress that enough.