Think about it. Why did they take a pregnancy test in the first place? OR did she ask them to do it?? Those swimmers are slooooooow. She wouldn't have been pregnant immediately after the rape.
I was wondering the same thing. Maybe it has to do with protocol when someone makes a rape claim. Or maybe it's to let the woman know that she is already pregnant if she's planning to take the day-after pill. I always forget, is that the one that is abortive?