Hi, I'm A-. My DH is O . I've had to have RhoGam shots during my pregnancy. You get 1 during, and 1 after to make sure that if the baby is , at birth when the blood crosses, your body doesn't make antibodies and attack the baby's system.
Remember math class, postives and negatives? With 2 , no shots. With 2 -, no shots. It's onky - & .