Objectives: To determine for the first time using PCR the distribution of Rhesus (Rh) blood group in French Basques and compare these results with those obtained by serology in the same sample and in ...

Rhesus-negative blood is pretty rare and scientists are not sure exactly where it comes from. So does this mean it was injected into our genetic heritage by visitors from outer space? No, no it ...

In these 200,000 or more marriages a year, the wife lacks the Rh factor present in most blood and is Rh-negative; the husband has the factor and is Rh-positive.