Didn’t you read what I wrote? While life begins at conception, most rapes would not even make a conception. Most of the time an egg is not available. Now, sperm can live in there for up to a week, true. But if you take the morning after pills, which are just hormones in short term high quantities to make the uterus inhospitable, you are really taking birth control because you are doing it before any conception probably took place, and again, a conception most likely did not ever take place anyway.
I agree that there is a chance the pill would be actually abortifacient. But in 90% of rape cases, it would be an unnecessary preventative, or perhaps birth control, i.e. Preventing conception as birth control does.
https://lifeethics.wordpress.com/2006/09/02/review-plan-b-how-it-works-and-doesnt-work/
The Plan B regimen only works (when it works) by delaying ovulation and slowing down the sperm (it makes the cervical mucus thick). There’s lots of evidence that it doesn’t interfere with implantation, none that it does.
In contrast, the new morning after pill, EllaOne ( https://lifeethics.wordpress.com/2010/10/28/ellaone-the-new-post-coital-or-morning-after-pill/ ), may indeed interfere with implantation by delaying the progesterone rise that makes the uterus “hospitable” to implantation.