Being raped and lack of conditions to raise a child are the most usual excuses that people take to justify an abortion, but a great percentage of those who abort, do it for having not prevented theirselves when having sex, and are too young to due with the responsability of becoming a parent. In spite of in some cases it seeming mercyfull to take this extreme decision, in others it's nothing but murder.
Being raped is the only excuse which's acceptable for justifying an abortion, 'cause having a baby is something that radically changes the life of anyone, and having it without an expontaneous will, and not having the guilt for having it is not fair. Also because children should come from a man and a woman who both agreed with good intentions to have it, and for someone whose father (or mother) is unknown, and the raising parent didn't really want to have him, sure feels unexplainably bad, and could well give charge to a clinical depression and who knows a suicide. What's more, these people also run the risk of being neglected by the raising parent, for a half of their genes comes from an unknown and mentally unhealthy person, and the memory of him/her may mean a great trauma.
About those who are truly guilty for becoming pregnant; they should have their cases examined particularly, but generally speaking, those who have conditions to raise the child should not be allowed to abort it, and also should be monitored by the government, and live under the risk of being fined or arrested if they don't take care of the child. Those who have not the condition to raise the baby should be allowed to abort it, and be sterilyzed right after.
Resuming what've just being said, those who were raped should have the right to abort, those who haven't the condition to raise the child should also have the right to abort, but should be sterilyzed too, and those who have conditions to raise the child shouldn't be allowed to abort, and also should be monitored by the government for checking if they are properly raising the child. That's my opinion.