I'm O-, DH is A+ as are both DDs. First DD was fine, and I had the jab, then had a latish miscarriage (a boy) but no jab. When DD2 was born she was really yellow and jaundiced, in intensive care for 5 days, First they blamed the Rhesus factor but after loads of blood tests came to the conclusion that the culprit was a rare factor found in Group A which had only been identified in the last few months. Cue visits, even when we were home, by researchers, to take samples of blood from both baby and me.
It is not much fun being a rarity. I was told that should I have another pregnancy, I was not to worry as they would change the Baby's blood in utero (that is why we stopped at 2) but also that I must never be a blood donor because of the antibodies I carried which could kill someone (a plot for a murder mystery perhaps?).
All this, just to point out that there is more to blood groups than the ABO and Rhesus factors.