Abortions typically happen prior to 12 weeks into the pregnancy. This is a period when most women won't mention that they are pregnant because there's a chance that the pregnancy won't be a success on its own. You can decide that the human soul starts at conception and that any termination of pregnancy is a lost life. But a lot of people don't think the metaphysics of a soul should be something the government decides. If you think a typical abortion is murder then we should be holding funerals for miscarriages (far more miscarriages happen than abortions). 

Late term abortions, or when the infant is viable and could survive outside of the womb, are extremely rare. This is where the 'pro choice' rights become important. The mother's life, the infant's life, or both are in danger and the mother has to chose the medical procedure to save her own life. I 100% think the woman should have the right to choose in these scenarios.