That being said, if you are raped, the law proscribing abortion's objective to preserve chastity and responsibility is greatly lessened if you had no power over whether or not you conceived.
I reject the idea that abortion should be proscribed in order to preserve chastity and responsibility. Do we criminalize fornication anymore? Do we still send debtors to jail for failing to repay their debts? The only reason I see as being valid for proscribing abortion is that in doing so one is protecting a human life. When human life begins is a subjective question that is best left to legislatures to determine the answer a society will use. (Which may lead to objective standards for determining if a human life has begun according to that subjective answer.)
So, why are there so few, or any "pro-life" regimes that punish the killing of an unborn person in a different way than killing a born person?
Criminal penalties aren't just about the harm done. They are also about the intent and circumstances, and what society at large will allow.