There are verses that indicate that life begins at thirty days after birth. At the first breath. And some even say at conception. It is not clear at all when the Bible says that life begins. The Bible nowhere opposes abortion and in at least two passages seems to indicate that even a forced abortion is okay and that an accidental one is only worthy of a monetary fine. Now one's personal agenda will often determine which verse a person chooses to support their case. But the antiabortion case in the Bible is very weak. There are special people that God knew of before their birth, but even that is unclear. How far back did God know this person? It does not say at conception, and in fact it could easily be before conception. That is the only verse that even comes close to an antiabortion verse, but again, that was a specific standout person. It was not the run of the mill person.
To me it is rather clear that it is an abuse of the Bible to say that it is antiabortion since the "pro"abortion verses appear to be clearer.