Check out this site it has some good information on RH
http://www.associatedcontent.com/article/1429668/the_rh_factor_in_pregnancy_do_you_need.html
I would ask the OB when you see them next or just remind them. They almost forgot I had group strp B with mine and I had to remind them to give me the meds for it in the hospital. I'm not sure when they are supposed to give the shot for that though... I think not until closer to delivery.