The Bible never specifically addresses the issue of abortion. However, there are numerous teachings in Scripture that make it abundantly clear what God's view of abortion is. Jeremiah 1:5 tells us that God knew us before He formed us in the womb. Psalm 139:13-16 speaks of God's active role in our creation and formation in the womb. Exodus 21:22-25 prescribes the same penalty for someone who causes the death of a baby in the womb as the penalty for someone who commits murder. This clearly indicates that God considers a baby in the womb as just as much of a human being as a full-grown adult. For the Christian, abortion is not a matter of a woman's right to choose. It is a matter of the life or death of a human being made in God's image (Genesis 1:26-27; 9:6).
The first argument that always arises against the Christian stance on abortion is, "What about cases of rape and/or incest?" As horrible as it would be to become pregnant as a result of rape and/or incest, does that make the murder of a baby the answer? Two wrongs do not make a right. The child who is a result of rape/incest could be given up for adoption to a loving family unable to have children on their own - or the child could be raised by its mother. Again, the baby should not be punished for the evil acts of its father.
The second argument that usually arises against the Christian stance on abortion is, "What about when the life of the mother is at risk?" Honestly, this is the most difficult question to answer on the issue of abortion. First, let's remember that this situation is the reason behind less than one-tenth of one percent of the abortions done in the world today. Far more women have an abortion because they do not want to "ruin their body" than women who have an abortion to save their own lives. Second, let's remember that God is a God of miracles. He can preserve the life of a mother and a child despite all the medical odds being against it. Ultimately, though, this question can only be decided between a husband, wife, and God. Any couple facing this extremely difficult situation should pray to the Lord for wisdom (James 1:5) as to what He would have them to do.
However, here are a few passages to consider... John 12:25, John 15:13, Romans 6:23
In 99% of the abortions performed in the world today, the reason is "retroactive birth control." A woman and/or her partner decide they do not want the baby they have conceived. So, they decide to end the life of their child instead of dealing with the responsibility. This is an utmost evil. Even in the more difficult 1% of instances, abortion should never be the first option. The life of a human being in the womb is worth every effort to allow a full-term birthing process.
For those who have had an abortion - the sin of abortion is no less forgivable than any other sin. Through faith in Christ, any and all sins can be forgiven (John 3:16; Romans 8:1; Colossians 1:14). A woman who has had an abortion, or a man who has encouraged an abortion, or even a doctor who has performed one - all can be forgiven by faith in Jesus Christ.