Let me see if I can get this ball a'rollin'...
A large portion of the debate revolves around the classification of the fetus: Is it a person? Does it possess the same rights that other persons enjoy?
Under the law, fetuses are not considered persons. Consider California Penal Code 187(a):
Murder is the unlawful killing of a human being, or a fetus, with malice aforethought.(emphasis added)
Note that fetuses are named specifically apart from the class of human beings.
More generally, consider the Fourteenth Amendment to the Constitution:
Section. 1. All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.(emphasis added)
Fetuses, not being born, are not afforded protection by the Constitution.
In my own opinion, however, the issue of personhood with regard to the fetus is totally irrelevant. It is irrelevant because the fetus exists solely at the pleasure and provisional consent of the mother.
No other person, born or unborn, has any right to occupy the body of another person in the way that the fetus occupies the body of the mother.
No other person, born or unborn, has any right to metabolically attach itself to the bloodstream of another person.
No other person, born or unborn, has the right to forcibly extract nutrients from another person's blood and inject it with hormones and waste.
If another person accomplished any of these things without the
explicit consent of the other person involved, that person would have an unconditional right to determine those actions to be violations of his or her fundamental rights, and that person would be protected by the Constitution to use even deadly force if necessary to end that violation.
Now a few other comments...
Originally posted by: Whoozyerdaddy
2. It's not a bacteria... it's not a parasite. It's the natural result of successful fertilization due to sexual intercourse.
A fetus most certainly is a parasite by any ordinary meaning of the term. Also, a fetus is merely one "result of successful fertilization due to sexual intercourse," but it isn't the only one, and it isn't always that either.