When looking at the issue from a world perspective, most of the countries that ban abortion do so from the argument related to the embryo/fetus being life.
Again, this discussion regardless of where it is around the world relates to how culture, race, and religion of a particular group of people perceive life. In cultures where life is seen as eternal, the fetus and having children are seen as very important parts of being good human beings.
For a woman to have an abortion, it is essentially seen as a violent act against nature and the unborn child itself. For this reason, countries that ban abortion do so because of a deep respect for life.
Another reason the abortion is banned is because it is deemed unsafe in some parts of the world. Whether the country has inadequate medical supplies or cannot provide the proper medical professionals to perform the procedure, the procedure is not really safe. Furthermore, women who do have abortions without the proper care risk exposure to serious complications.