Joined: Aug. 2005
Going back to the original post, obviously life exists with or without conception. But some (please note - some) biologists consider pregnancy begins at implantation of the embryo. This is spatially and temporally distinct from fertilization.
If human consciousness were to start at fertilization, then we would surely have to do something about all those fertilized eggs that are NOT successfully implanted by mother nature.
If I fly the coop some time
And take nothing but a grip
With the few good books that really count
It's a necessary trip
I'll be gone with the girl in the gold silk jacket
The girl with the pearl-driller's hands