This antigen is present in 85% of people (those with an Rh-positive blood group). Similarly, its absence characterizes the Rh ...

Nebraska Republicans introduced a bill that imposes invasive and unnecessary requirements for physicians to prescribe medication abortion, which medical experts say amounts to a total ban on the pills ...

nor why some people lack the protein, but an issue can arise if an Rh-negative person is pregnant with an Rh-positive fetus.

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 ...

nor why some people lack the protein, but an issue can arise if an Rh-negative person is pregnant with an Rh-positive fetus. In this scenario, called Rh incompatibility, the pregnant person's ...