Think of it as an assembly line and the fertilized egg as a blueprint of information ready. It begins it's 9 month process to begin getting materials for the building process of creating a "life", but the process itself is not technically "alive" (as the meaning you and I both understand it... breathing free form thinking human being).

So stopping the process is not technically killing the fetus.. because the fact is that the fetus was not formed yet. But all that changes once the fetus is formed..(we could debate this as to what time constitutes a fully formed fetus) and when we terminate the fully formed fetus we are thusly killing life and that I am against.

We could go on about this... back and forth...

good discussion nonetheless