I can think of lots of reasons to promote abortion:
- Children benefit from parental care. They NEED it to survive the first 15 years of their life. 2 parents are better than 1. What if the father leaves and does not want to take care of his child? Than the child might be better off if it is never born.
- If the mother is too young she will not be able to teach a child everything it needs to know (and might have to leave school prematurly because of it). It would be in everyone's best interest to abort the child and try again later,in a more secure situation where the child can receive all the attention in deserves.
- We can consciously foresee what changes a child will bring to our lives, and we can decide that it would not be in your best interest to raise a child now (because of financial situation, or because you just want to live a bit before starting a family).
According to this article, many mammals can abort their foetuses/foeti when there is little food around and preserve the energy/nutrients that would have been used in the growing of babies. Why would god built in an 'abortion mode' if he doesn't like abortion?