The fetus is a parasite and, as such, one has no obligations toward it. Anyone should be allowed to abort at any time, as many times in their life as they want. If I'd come to know that my mother had had abortions before having me, and even considered aborting me, I really wouldn't care at all. Even if she wouldn't have wanted me after my birth, I wouldn't care. All that would matter is that she changed her mind. If one even wishes to use abortion as a means of contraception, one should be allowed to do so, although I fail to see why anyone would.
Anastasia's comment on that "no one" ever likes abortion is completely false. The vast majority doesn't, but some, such as myself, think it can be something that creates harmony. I myself do not, however, actually like abortion, because the best is always if the unwanted fetus isn't created, in the first place, so the one who does not wish it, won't be exposed to this parasite.
As for Carolyn's comment on letting it live by giving it away through adoption; again, one does not necessarily wish to be pregnant, in the first place, much less damaging one's genital area through stretching.
Of course, if one does not wish to have children, the very best is always to have oneself sterilised, so that parasitic sperms won't have the ability to establish themselves. Granted, some change their minds, so those who want to leave the possibility for pregnancy open, should be perfectly allowed to do so.
