Life, liberty, pursuit of happiness. The order that those fall in is significant, you cannot have one without the one before it. You cannot be happy if you are not free, you cannot be free if you are not alive. A woman not aborting a fetus, would be temporarily giving up her happiness. Aborting a fetus would be taking away all 3 of those rights. So you have 2 options, one involves taking away one right temporarily, and the other involves taking away all three permanently. Now in a perfect scenario, no one would have to lose ANY of their rights, but this scenario makes you choose from 2 evils. This shows that at the very least the moral status of the fetus deserves to be considered.