Crobat_Trainer
*insert user title*
This is where you fall short. Cellular reproduction in a multicellular organism is growth. By this logic, I am giving birth every time I grow or gain weight. (And I'm a male, so this would be kind of awkward. o.o") Reproduction in the sense of living creatures means giving birth.
Actually, I'm pretty sure that cellular reproduction is what is meant when the criteria for life are listed. If "reproduction" were restricted to having the ability to give birth (or, in the male case, to make birth possible), then one could not consider single-celled organisms living things. Bacteria, which are single-celled and reproduce just by splitting in two, are alive, hence the term "antibiotic" to describe chemicals that can kill bacteria ("biotic" referring to life). Even multicellular eukaryotes that reproduce asexually couldn't be considered alive by your definition of "reproduction," sponges and hydra being my main examples here (budding, anyone?). In fact, we can even go further. If "reproduction," as it is listed in the criteria for life, were restricted to being able to give birth, "hybrid" species such as mules (horse + donkey) would have to be considered non-living, since their odd number of chromosomes restricts them from forming viable zygotes. Mules can't give birth to other mules.
So I'd have to agree with the question marks guy in the sense that, yes, of course the fetus is alive, even when it is only a single cell. It seems almost ridiculous to argue otherwise, from my perspective. It's also human, as has been said, because it has a full set of unique, human DNA all the way from conception. In this way it's also silly to argue that it's part of the mother's body, since, although it shares some of her DNA, it's still a completely different organism.
That said, I have to go on to say that I am pro-abortion (pro-choice, if you prefer). Yes, it's human, and yes, it's alive, but I don't think it's "wrong" to kill anything that is both alive and human. There is, perhaps, an automatic repugnance to the concept of murder, but feeling bad about something doesn't mean that said thing is "wrong."
So, yeah, I think abortion ought to be legal.