As far as blood groups go, the only time there would be an issue is if you are Rh-, and your husband is Rh+. For example, I am O-, and my husband is A+. I have to receive a shot late in pregnancy and again post-delivery, so that if the baby's blood group is Rh+, my body will not produce antibodies against it. If you are both the same blood group (A, AB, O, B), there is no problem. If you are both the same Rh factor (both negative or both positive), there is no problem.