One thing to remember about rape: it is possibly the most underreported crime [next to theft of illegal drugs, of course], so how can anyone cite facts with any accuracy?
Women have learned that reporting a rape that isn't likely to result in the attacker's arrest and conviction, for whatever reason, is an exercise in futility with humiliation, shame, and not a few nightmares thrown in.
A woman who didn't report the rape when it happened isn't likely to report it a few months later, when she discovers she's pregnant - and she's almost certain to want to abort. Forcing her to continue a pregnancy is even more barbaric than abortion, as her life is an indisputable fact.
Forcing any woman to continue an unwanted pregnancy to term is as wrong as the belief that rape causes the body to prevent conception, but some people still want to control decisions they have no right to make.