A member asked:

What is rh positive and rh negative?

A doctor has provided 1 answer

Blood group antigen: Rhesus (rh) blood group is one of the more than 20 different blood group systems. One of the markers in rh system is "d" that is used in the terminology you inquired about. If rh d is present the person is rh positive and vice versa. See this site for more info (more than one needs) http://www.Ncbi.Nlm.Nih.Gov/books/nbk2269/.

Answered 3/26/2013

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A member asked:

Rh negative and the baby's father is Rh positive. Do I need rhogham?

4 doctors weighed in across 2 answers