Seems kind of arrogant to suggest that your perspective is the only valid one, and that any others are simply justifications.
My view, btw, is based upon law.
In Roe v. Wade, the court ruled based upon viability of prenatal life, dividing pregnancy into trimesters. Each successive trimester, the state was given more power to regulate or deny abortions. As medicine has improved the viability of the fetus outside the womb from 28 weeks to 24 weeks, the courts have adjusted accordingly.
In a recent well publicized case, Scott Peterson was accused of murdering both his wife and unborn son. So the fetus is a life after all.
In Roe, the court found a 14th amendment right to privacy to justify a woman's right to choose. Some justices to this day do not see this right to privacy in the 14th. However, it's common sense, and in the spirit of Liberty, that each of us (including women!) have the right to their own selves (bodies). I'd also think that the ending of slavery would mean everyone has a right to "own" themselves vs. being owned by someone else (a fetus).
To expand on my own view from there:
The fetus and woman have claims to the woman's body. The woman must prevail due to the privacy right. It's really a slam dunk.
As far as the constitution goes, "no person shall be deprived of LIFE, Liberty or Property without due process," and Roe is the due process.
That's great!
