Anti-choicers are always saying that "life" begins at conception??? What do they really mean by that? Most of them are theists, who really mean God implants a "soul", but most will hesitate to admit that this is what they mean. They know good and well there is no evidence for a soul nor can they prove when such an "endowment" takes place (provided one could prove that such a thing as a soul exists).
Christians just get hoist on their own petard with the soul argument. A soul is important to Christians because that is the medium through which they claim to experience eternal life. It is supposed to be our "badge" of superiority over the rest of creation. This notion that it's okay to kill, eat, and experiment on animals is supposed to be because they don't have souls. What is really funny here is that many other religions believe that not only do animals have souls, but so do "inanimate" objects like
rocks,
fire, or trees. Without some kind of empirical evidence, how does one decide which if, any religious viewpoint, is correct?
The question of just when a fetus gets this all-important soul arises. What many anti-choicers are ignorant of is that according to the early Church fathers, life did NOT "begin at conception". Aquinas and Augustine, following Aristotle's lead, declared that a male embryo acquired a soul at 40 days and the female embryo did so at 90 days. The "ensoulment" argument leads to one big philosophical problem, namely the logical impossibility of precisely defining the "ensoulment line" (the "bald-hairy" distinction problem). For instance, how can one PRECISELY draw a line between day and night? The "hairy-bald" problem with the fetus, is how could one draw the line as to when the fetus gets a soul (not to mention the FACT that there is no evidence that such a thing as a soul exists)? Such a determination is impossible because the fetus is continually growing.