If so, your baby will have Rh-positive blood. Or you might be what's called heterozygous, meaning you carry one negative and one positive gene. In that case, your baby has a 50/50 chance of having ...

Similarly, its absence characterizes the Rh-negative blood group ... pattern (both parents pass on a copy of the mutated gene ...

Another important antigen is the Rh factor, which gives the "positive" and "negative" signs to blood ... Mazières and colleagues found that the Rh gene variants found in many people today come ...