There are an infinite amount of disconnects on this topic, anyway.
The biggest disconnect is right at the start: when is it "alive". Heck, when is it "human"? These are two different questions - at 2 weeks, there's no visible difference between a dog embryo, a human embryo, or even a dolphin embryo.
Since people will disagree on this forever, the rest of the debate becomes, quite often, completely useless. If person A believes life begins at conception, his view will obviously differ from that of one who believes life begins at birth.
Both of these seem inherently flawed to me (on the one hand, conception takes place a heck of a lot more than we think - it would mean practically every woman with an active sex life has had half a dozen miscarriages, easily; on the other hand, saying birth is the marker would mean an 8-month-old baby that can survive on its own wouldn't, technically, be alive yet...which makes no sense).
A second problem is that, even accepting the same base, it's still possible to have wildly divergent views. Based on religion or other moral/ethical grounds, it can be considered either OK or not to terminate this life. Or, taking the other view, it can be OK or not to terminate this not-life.
Or, it can be OK to terminate this life (or not-life) up to a certain point in time (either determined as the point it becomes life, or not, as the case may be).
Then there's the added problem of when it is OK or not. While the two extremes are possible, there's all kinds of middle steps of rape, incest, physical harm to the mother, physical harm to the baby, deformities, social acceptance, wanted or not, and so on and so on. I could yammer on another hour, but I've grown tired of myself, so I stop now...for now.