That all depends on the country you live in and if politics effect your medical outcome. There is only a small chance the shot would work for me and that is if they gave it to me in my first pregnancy (which is not standard). I had a false period so I didn't know I was pregnant until I was 2 1/2 - 3 months pregnant. Because of that I can only have Rh- children, my body kills the Rh+ child. The shot will not prevent my body from killing the child. The shot only works when you have no antibodys present. They only way they could have prevented my body from producing enough antibodies to kill the next child is if they gave me the shot right when I found out I was pregnant and right after birth.