Yes, Todd Akin, victims of ‘legitimate rape’ get pregnant - here’s scientific proof*
If you're looking for hard numbers, the study concludes that the national rape-related pregnancy rate is 5.0% per rape among victims of reproductive age (12-45), and that an estimated 32,101 pregnancies result from rape each year**. Does 32,000 pregnancies per annum sound "rare" to you? It's not.
Five percent may not sound like much, but the fact is that couples trying to have kids would be ecstatic over a five percent chance of pregnancy per sexual encounter; what's more, a study published in 2003 in the journal Human Nature found that a single act of rape was more than twice as likely to result in pregnancy than an act of consensual sex:
"Our analysis suggests that per-incident rape-pregnancy rates exceed per-incident consensual pregnancy rates by a sizable margin," write researchers Jon and Tiffani Gottschall, "even before adjusting for the use of relevant forms of birth control." [emphasis mine]
Again, here are the numbers: the researchers examined data collected from 405 women between the ages of 12 and 45 who had suffered a single incidence of penile-vaginal rape, and found that 6.4 percent of these women became pregnant. This number leapt to almost 8% when the researchers accounted for women who'd been using birth control (according to New Scientist, US government statistics show that 20% of the women in the sample were likely to have been using the pill or an IUD). A separate study, conducted by the US National Institute of Environmental Health Sciences in 2001, found the per-incidence pregnancy rate for a single act of consensual sex to be just 3.1 percent.
*I've just copy+paste the content, so emphasises aren't included here.
**I haven't read the study, but someone who has reblogged my post on Tumblr, and said it's over three years. Still a lot, though.
Every time I think I've heard the stupidest thing anybody can ever utter, an American Tea Party politician comes and shows me wrong. If these people didn't actually exist, they would be hilarious fictional characters.