I support a woman's right to control over her own body, with the sole proviso that if she has entered into a marriage contract, then she shares the decision of whether to raise a child or abort a pregnancy equally with her husband, but a tie goes to the woman.
The world is overcrowded. Clinging to an outmoded moral view meant to increase the population of a wandering tribe in the desert 3000 years ago is ridiculous.
I have no belief in any god or gods, therefore the opinion -- or even the command -- of some god is meaningless to me.
I have no belief in a soul. Therefore, as far as I am concerned, abortion does not "kill" a soul or prevent it from coming into the world.