Well, following with that Kulverstukas said: What if a baby wasn't planned?
There's a problem, fundamental problem around here in this planet. Human Rights says you must respect the life of a person, otherwise you're a killer (I know there are scales for this, but let's talk in simple terms: black or white). Now, what if a woman sadly gets raped and the criminal didn't use condoms? They are unlikely to care and the woman/girl has high chances of getting pregnant easily. Too much trauma for getting an emergency pill either. So, since its "conception" a zygote is a person. So she can't abort, at least not legally in most underdeveloped countries, which is where this kind of stuff happens most. Pretty much fucked literally.
Not to hijack a thread by misleading the main topic this way, but I personally think that way beyond fetus wanted or unwanted, Human Rights could be adapted to our current needs. Seen the overpopulation mentioned around and in underdeveloped countries, babies born each 15 minutes or so. I've seen in the news that a girl can't save her own life, because she needed to abort but she has to abide to a law that doesn't let her to abort.
http://edition.cnn.com/2012/07/25/world/americas/dominican-republic-abortion-teen/index.html
Some things must change in this world. Radically or not, we, as species can't survive if we can't adapt to the new conditions, and our own laws are starting to shrink our life quality. I have particular thoughts about this kind of stuff, let's not talk further about it.
And btw: I've been asked several times... what if I myself was aborted? well, bad luck. Sometimes we win, sometimes we lose.