There seems to be a lot of confusion where Rh status and pregnancy are concerned, so I thought I would make a chart for you to check against.
You have to remember though, that problems only occur when the positive baby or the positive Mother passes their own blood to a negative Mother or baby.
To avoid all problems completely you should only have children with someone who is the same Rh status as you. This is also not taking into account all the other factors in blood like Kell, Duffy and others which can also affect pregnancy.