I am B negative and my husband B positive. I had to laugh when I read another poster said B positive men are bossy! He sure is although not aggressive or abusive. He is actually quite gentle and a great father. But I digress. Our daughter is B positive also and our son O positive. I had Hellp Syndrome with both pregnancies and they were 8 years apart. My pregnancies were normal and healthy until the 36-37 week mark. I did have the rhogam shot at 28 weeks with my first, then after her birth. With my son I refused the rhogam at 28 weeks as that is not done in other countries and I felt that I would get the shot after his birth and that should be enough (I had done more research at this point). My mother is B- also and back in the 70s they only gave Rhogam within 72 hours of giving birth, not at 28 weeks. I should note I also had a miscarriage a couple of months before I conceived my son and they also gave me a Rhogam shot right after I miscarried as there is no way to know what blood type that baby would have been.
I wonder if my husband does not carry the gene for negative blood and that is why I had such difficult births and a miscarriage, whereas my Rh negative mother and A positive father had 3 healthy children and my mother had no problems in her pregnancies. My father clearly must carry the gene for it even if he is Rh positive.
I was also my mother's first so she didn't need the shot with me.
I am also fascinated by the fact that most royalty and many presidents have Rh negative blood. I read once that it is speculated that Anne Boleyn might have been Rh negative, as her first born was healthy but she only miscarried after that. Of course, that would mean Elizabeth I was Rh positive.
I am also curious the rate of Hellp Syndrome and pre-eclampsia among Rh negative mothers bearing Rh positive children.