||October 19th, 2013 01:57 PM
Rh Negative Blood and Pregnancy
You are probably somewhat familiar with blood types. Your mom may have told you that you were O+ or B-, etc. Blood is grouped into A, B, AB, or O and also by the Rh factor, either negative or positive. Most people are Rh positive. This means they have an antigen on their red blood cells for the Rh factor. People without the Rh factor antigen are Rh negative.
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