Roe's problem is not a right to privacy. By this I mean the Roe case
is actually not about a right to privacy. The majority in that decision had to find a way to at least appear as if their decision was rooted in the Constitution, so Roe became a "woman's right to privacy" case. IMO, that's really a canard (albeit a highly successful one).
Here's why I believe that:
- If we were to take two people at random, one a committed "pro-lifer" and the other someone equally committed to "pro-choice," almost certainly both would agree that a mother's right to privacy does not extend to a point where she and her doctor can decide to end the life of her 3 week old child (i.e. a child born 3 weeks earlier). The reason why they agree is hopefully obvious: both see that a three week-old baby as fully human and thus in possession of a right to live that supersedes any right to privacy of (and almost any other right bestowed on) the mother.
- Now pull things forward a few weeks, and we're talking about a fetus in the ninth-month of gestation. Unless the public opinion has shifted dramatically in the last few years, most Americans are in favor of abortion restrictions at the end of term. Even though the the child/fetus is in utero, most people agree that the fetus is developed enough to be considered human, and its right to live supersedes the mother's right to privacy and to "choose." More importantly, Roe codifies at least this much. RvW effectively says that a woman's right to privacy can be made subordinate to, say, a 36 week old fetus's right to live if a state wishes to do so.
- We can keep sliding this scale backward toward the point of conception where we'd find a minority of Americans considering a fertilized egg as being "human" and a majority of Americans considering it not human. Roe imposes on the states a ban on declaring a fertilized egg as human.
The point of all this is to demonstrate that a right to privacy --- including the right as defined in Griswold -- is not the deciding factor in when abortion can and cannot be done legally in the United States.
The definition of what is human and what is not human is the deciding factor.
Which brings me back to Roe's glaring flaw. Whether the court's majority acknowledged it or not (and they didn't) Roe effectively establishes a first trimester threshold when defining human life. States are prohibited from defining life as stating earlier than week 12 but may do so after; i.e. to decide Roe the way they did,
the court had to establish a de facto legal definition for human life as starting no earlier than week 12, and I argue no where in the Constitution are they granted that authority.
(An aside, posts like the above usually draw a 'Third trimester abortions are almost always done only when the life of the mother is at risk!" reply; yes, that's true, but then it's no longer a privacy issue. The mother has a right to live just as the third trimester fetus does, and where those rights are in conflict the principle of self-defense becomes the justification for the abortion, not privacy.)