They define pregnancy at implantation, so that is how they can dance around the fact that these pills can prevent a newly concieved life from implanting. If you believe that life begins at conception, then you believe these pills can end a human life.
This is exactly why this clinic gave her the morning after pill. If the embryos had implanted, they would have given her RU486 or an abortion at a clinic.
I have acknowledged in the past (and even in this thread) that the morning-after pill can, in extremely rare cases, be considered abortive. I was taking issue with the article itself misusing the term implantation and the subsequent comments labeling the morning-after pill as something it is not.