Well, as I have pointed out using the "pro life" side, no where in the Bible does the word "abortion" appear. However, in Leviticus 27:6 a monetary value was placed on children, but not until they reached one month old (any younger had no value). Also, in Numbers 3:15 a census was commanded, but the Jews were told only to count those one month old and above - anything less, particularly a fetus, was not counted as a human person. In Ezekiel 37:8-10 we watch as God re-animates dead bones into living soldiers, but the passage makes the interesting note that they were not alive as persons until their first breath. In Genesis 2:7, Adam had a human form and a vibrant new body but he only becomes a fully-alive human person after God makes him breathe. And in the same book, in Genesis 38:24, there is a pregnant woman condemned to death by burning. Though the leaders of Israel knew the woman was carrying a fetus, this was not taken into consideration. If indeed the Jews, and the God who instructed them, believed the fetus to be an equal human person to the mother, then why would they let the fetus die for the mother's crimes? The truth is simple. A fetus is not a human person, and its destruction is not a murder.
And then the verse that states it the best...
"And if men struggle and strike a woman with child so that she has a miscarriage, yet there is no further injury, he shall be fined as the woman's husband may demand of him, and he shall pay as the judges decide. But if there is any further injury, then you shall appoint as a penalty life for life, eye for eye, tooth for tooth, hand for hand, foot for foot, burn for burn, wound for wound, bruise for bruise." Exodus 21:22-25