"From a scientific standpoint, what's legitimate and fair to say is that a woman who is raped has the same chances of getting pregnant as a woman who engaged in consensual intercourse during the same time in her menstrual cycle," said Dr. Barbara Levy, vice president for health policy at the American Congress of Obstetricians and Gynecologists.
One widely accepted study suggests a 5 percent pregnancy rate following rape, resulting in 32,000 pregnancies each year.
The report was from the Medical University of South Carolina and was published in the American Journal of Obstetrics and Gynecology and cited by the U.S. Centers for Disease Control and Prevention.
But placing an exact figure on post-rape pregnancy is problematic, primarily because rape is thought to be underreported. Another factor is the availability of over-the-counter emergency contraception, which can prevent fertilization when taken after intercourse.
One study from the journal Human Nature in 2003 suggests pregnancy rates are higher after a rape when compared with consensual sex because of the inconsistency of birth control use.
I’m sure you’ve seen the clip that has now gone all over the world.
And Perry is taking a pounding from the pundits.
CNN's Jack Cafferty told Perry it was time for him to "just go away," saying: "This 'aw shucks,' grade-school stuff may play in Texas -— but I, sir, don't want you anywhere near the nuclear launch codes."
Hardball’s Chris Mathews labeled it a “brain freeze” on his show.
The Washington Post called it a "senior moment."
And the U.K.'s Globe and Mail eloquently dubbed it a "brain fart."
I call it “ideological idiocy.”