Exact percentages vary with race, but most people are Rh-positive. A woman with Rh-negative blood has nothing to worry about if their baby is also Rh-negative, and a woman with Rh-positive blood ...

If Neanderthal women mated with Homo sapiens or Denisovan men, there was a high risk of newborns having neonatal hemolytic ...

But if you don't have the protein, you're RH negative. You don't necessarily have to have the same blood type as your baby since the baby will inherit characteristics from both parents.