Dont IUDs and emergency contraception prevent the implantation of the embryo post fertilization on the uteran wall and therefore for someone who considers life to begin at conception no different from abortion.?
Edit:
http://www.popcouncil.org/uploads/pdfs/Sivin.pdf
Apparently IUDs don't stop implantation at a rate any greater than a control group. Though this shouldn't be pinned on the judges as it appears from some of the linked areticles that the science of IUDs was never challenged