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

Similarly, its absence characterizes the Rh-negative blood group. Of the 61 known blood group antigens, the negative/positive ...

Was blood a factor in the demise of the Neanderthals? New research is showing that Homo sapiens underwent huge changes in ...

Human populations that left Africa evolved quickly whereas Neanderthals stayed the same, according to an analysis of blood ...

Medical emergencies strike without warning. Whether it's a car accident, severe allergic reaction, or unexpected surgery, ...

It's a bit simplistic, but you can think of the Rh factor as a protein that is either present (positive) or absent (negative) on red blood cells. Exact percentages vary with race, but most people ...

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.