Understanding Rh Incompatibility & Pregnancy - A Guide for Parents

Question
My LMP was April 19th, 2006.  I have 2 children. One son 15 yo from a previous marriage and an 8 mo healthy baby girl.  I am again pregnant, however my OB called saying that there is a problem with my Rh antibodies.  I don't understand.  I am A+ so I already have the antibodies.  I'm not absolutely sure what my husband is.  Why would I get the antibodies if I am A+?  I have to go to a specialist but have yet to hear from tham to schedule me.  I'm confused.  Please give me you opinion.  Many Thanks!

Answer
It is possible that you are not really Rh + and you are realy Rh -. Thus you probably  did not received RhoGam in the last two pregnancies and could have become snesitized. If you are A +, you could not have  antibodies. Nothing is done before you are 28 weeks. I would suggest that you see your doctor right away to see what  the problem is.