Why do so many conservatives say life starts "at conception"? Aren't conservative Christians supposed to rely on the Bible for their Truth? Are they relying on the Bible in taking this "conception" position? If so, how? The blood is the life. Deut. 12:23 For the life of a creature is in the blood. Lev. 17:11 Often, for support of the conception position, I've heard people rely on the verse where God says, "I knew you in the womb." But the Bible also says God knew us from eternity past, so when God "knows" us can't be said to determine when life begins. If it did, then our life begins an eternity ago, long before conception, and even choosing to not be intimate on a night when a couple normally would be could be construed as "murder" (which would make no sense at all... but that would be the logical outcome). In fact, that logic seems more in line with the Roman Catholic position that any contraception is evil, because life has already been "set in motion." Perhaps starting to be intimate then stopping would be evil too... I mean, there are so many questions if you rely on when God "knew" a person. Are there other verses supporting the conception position that I just have not heard anyone mention? I'm asking that honestly, because I've not discussed this topic much with people (it tends to be sensitive and arouse strong feelings). The embryo gets its own blood type and starts making its own blood at 7 weeks. The life of all living creatures created by God is said to exist in that creature's blood (see Scriptures above), therefore can it be said the life of any creature begins at around 7 weeks, when the person's blood exist? Is that a more biblical definition for when life begins? Any definition is going to be at least a little bit of a stretch, because the Bible doesn't clearly approach the topic directly. But this seems like less of a stretch then the "known in the womb and from eternity past = life starts at conception" position. Perhaps "conception" was the "safest bet" to say when life began just to be sure no babies were being killed... that is, before medical science was able to show when an embryo gets its own blood type and starts making its own blood. Is "at conception" really a tenable position, Biblically speaking, now that we know more about the timing of blood creation in human reproduction? Is it possible that pro-abortion advocates were actually partially right in that, for a certain amount of time, an embryo is really part of it's mother's life instead of being its own life? (just not until live birth, as they said, but only until 7 weeks!?) If not, then why, biblically speaking, does life not exist before conception but it does afterwards?