Abortion, and things such as assisted suicide, are moral evils.
It cannot be said enough that being against abortion is a philosophic and not inherently religious stance. Society likes to dismiss it as merely religious so that it can justify the deed. Separation of Church and State and all that, you know. It's funny how they don't mind religious action on other matters, such as poverty and capital punishment, but that is a question for another time.
Human beings have human babies. Common sense tells us as much. Science, if you simply must have everything interpreted empirically, tells us as much. When a couple decides to have a child, they fully expect a human child. Even in the despicable cases of rape and incest, we cannot set aside the question of personhood involved with the child simply for the sake of the unfortunate (in terms of having a crime committed against her) mother. We know that a pregnant woman is carrying a human being. To deny that is intellectual dishonesty, or worse: a moral evil perpetuated by those who benefit from the act of abortion.
Likewise, assisted suicide and any form of euthanasia must be seen too as abhorrent. Did you put yourself on this Earth? No; indeed, you had no say on the matter. Why ought you have in say in how and when you leave? We have addressed the question philosophically, without an appeal to any higher authority. This before we get into the question of someone helping you...which means that someone helping you check yourself out must be doing something wrong too.
These conclusions can be derived by logical argument and inference without any reference to religion. It is time that we as a society accept it as such, and act accordingly. Short of that, we are simply savages.
You must respect innocent life from conception until natural death if you expect your life to be respected similarly. We are less than human otherwise.