Learn who can donate blood to you and who you can donate to, plus the importance of blood types, Rh factors, and why O-negative is a universal donor.

What is Rh-negative blood? Karl Landsteiner and Alexander Wiener played the most significant role in identifying the Rhesus blood type.

The mysterious Rh factor-in human blood had disturbed the serenity of many a mother-to-be. For if a wife's blood were Rh negative and a husband's Rh positive, their child might be stillborn, ...

When I had my children in the ’60s, I was in the original study conducted to see if my AB negative blood type would hurt my children. I understand that the Rh factor can hurt unborn babies.

When a mother has the Rh-negative blood type and the father is Rh-positive, there is the potential of immunizing the mother against the blood of her developing baby.

Since it lacks A, B, and Rh antigens, anyone can receive O-negative blood in emergencies. Type AB-positive: AB-positive is the universal recipient for red blood cells.

When I had my children in the ‘60s, I was in the original study conducted to see if my AB negative blood type would hurt my children. I understand that the Rh factor can hurt unborn babies.

It causes trouble after Rh-positive blood (containing the factor) gets into the bloodstream of an Rh-negative woman (whose blood lacks the factor).