Global health authorities are updating policies to conserve scarce Rh-negative blood while new scientific breakthroughs reveal ultra-rare blood types. Australia has expanded donor eligibility to ...

Doctors stumbled upon a type rarer than “golden blood”—and suspect more patients carry the bizarre genetic anomaly.

In March, the U.S. FDA reported a major shortage of Rhogam, the anti-D immune globulin most widely used to prevent Rh factor incompatibility in pregnancy. Without treatment, second and subsequent ...

There’s more history in your blood types than you think, and it didn’t begin with humans. Here’s what we know about them, ...

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, or born ...