You do not seem to be trying very hard, as you went into the concept of the soul and choices it made before conception pretty extensively. You opened the door, now you close it when it is proving your holy ghost as a fraud. How convenient. Keep up the excuses, it only makes you look all the more guilty.<quoted text>
I am trying to leave religion out of this. We aren't talking about when the soul enters the body or anything like that. We are talking about the development of a child and the choice to end that life.
You believe that life of a zygote has a soul, thus you are trying to protect that soul. Atheists do not believe it has a soul. I do not think a zygote is a human in the sense of what a being with a brain is. Potentially it could be a human. But the word, potentially is key. You use that term because a zygote is not a human at the point. It might be human-like, but that is not human. It is a potential human. This is why other human-like examples were given by another poster.
A zygote has no brain. It has zero thoughts. You believe a soul has thoughts. So we have a fundamental disagreement of what this zygote is capable of. Before the life has thoughts, I feel it is not bad to terminate.