I'm negative and DH is positive. My mum is negative and my dad is positive. My sister and I turned out fine! I'm sure I read that there can be more problems with your second child???

Anyway, I think if you are 'Rhesus negative' and you miscarry you may need an injection of 'anti-D immunoglobulin' within 72 hours after the miscarriage.

I found this info:

Anti-D immunoglobulin is aimed at preventing the woman from developing antibodies in her blood stream (also known as agglutinins'). It is possible for this to happen if a woman with a 'negative' blood group conceives a baby with a 'positive' blood group. The incidence of a woman developing antibodies through miscarriage is thought to be up to 7% if the miscarriage occurs during the first 13 weeks of the pregnancy and up to 20% for miscarriages after 13 weeks.

Do a Google on 'Rhesus negative' - there are lots of articles about. I think there may even be one on Belly Belly...