Is Plan B a spemicide? Because what you say is true. If the sperm were rendered useless by a spermicide, then no conception would take place.
spemicide=spermicide
And that's what people forget. Plan B's primary goal is prevent conception by flooding the body with hormones and stopping ovulation. Then it tries to prevent conception if an egg is already released. And finally if conception does occur after all that, then it prevents implantation.
I just can't see how the extreme Pro-Lifers see this as another form of abortion.