I don't think we should kill the children concieved of rape. I say we should kill the rapists, instead. Yep, you heard me... and use them for medical experimentation, too. It should go in this order:
1. Test medical treatments
2. Test things like addiction/withdrawal processes and bone healing ratios
3. Test bullet-ricochette behaviors and such
4. Assuming they survive, put them in a room and rent them out. Also nearby will be rental baseball bats, knives, and pliars. A vending machine will include table salts and condoms.