The way I see it, a "child" isn't a child until it has a consciousness. For us religious folk, there's also a believe that a zygote doesn't become a child until it is blessed with a "soul", as I've been mentioning earlier in this thread. In the old Greek school of thought, the body is the zygote/child's body, the soul is the soul, and the mind is the consciousness.
Even though all things are living, there's a difference between simply functioning and having a consciousness.
Zygotes, cells, bacteria etc are not conscious, do not carry any level of thought, can not feel, and do not share the mental or metaphysical capabilities of a normal human being. While they have POTENTIAL to be a child, realistically they are not one until a certain point.
That's why I classify stuff like the morning-after pill in the same category as condoms and whatnot; contraceptives. There's no "murder", but prevention. Frankly, we live in the 21st century and it's important people invest in protection so that abortion doesn't have to become a solution, since it's not a pleasant thought.
Even after this point, I find it's important that if the circumstances dictate it (be it that the mother's life is in risk, a product of rape, the home situation would only lead to the family suffering, the mother is too young or not equipped etc), the zygote should be terminated in order to protect the actually functioning being (the mother).
Whatever the case though, it's the mother choice since it's in her womb and she has to undergo the process. I personally would not like to be involved in the process or the decision-maker, but that's because I'm too much of an optimist always thinking about what would happen if something were to go perfectly.
I want to make a rant about religious people who blindly stick to "traditional values", but I'll save it.