Well, I don't know if they are pro-rapist, but they're certainly pro-whatever will maximize their continuing supply of fetal tissue. They make money off it.
They're pro-premarital-sex for the same reason that the Dole Fruit company is pro-sunshine.
Planned Parenthood has been caught repeatedly coaching young girls to lie about the nature of their pregnancy so that the investigating authorities do not have to be notified (lie about your age, lie about the age of your partner, say that you are not being coerced into this, that this is your own money, etc.).
They are pro-rapist.
The War on Women meme is a lie. There IS a war on women and it is waged by the Left.