It is not “magic”. The trauma and stress of the violence and the woman’s struggle makes the act of intercourse less likely to result in fertilization. Promt reporting followed by medical attention will also reduce the chance of implantation of a fertilized egg. It does happen though and the point is this is the only crime where the perp son or daughter is required to pay the ultimate price (death) while the criminal get a few years in jail.
You are aware that a great many people on the board consider such medical attention an abortion, don't you?
So far, I have seen no scientific evidence produced on this or other Akin threads of this medically ridiculous statement. If you have a study in a peer reviewed journal, cite it. There is research out there in a peer reviewed journal, cited by the CDC, that the conception rate is about 5%, and that an estimated 32,000 pregnancies annually result from rape.
Further, there is plenty of evidence from war zones, where incontestably forcible rapes result in pregnancy. For the Rwandan ethnic cleansing, the estimate was 2000 to 5000 children born of rape.
Does this work if she's knocked out or drugged? Or are these not considered “legitimate” rapes?