My latest reading of Kristin Luker's Abortion and the Politics of Motherhood
 (copyright 1984) was interesting because it brought to my mind 
discussions that I have had with people about abortion, as well as 
pro-life Republican Todd Akin's controversial comments during the 2012 elections.
Luker
 was talking about what the pro-life and the pro-choice movements may 
have to do to be successful in a country (namely, the United States) in 
which most people have middle-of-the-road views on abortion.  On
 the pro-life side, Luker believes that pro-lifers in some sense 
undermine their own position when they support exceptions for rape and 
the life of the mother, for that compromises their stance that the right
 to life is absolute and places them on a slippery slope.  Why,
 she asks, should we prioritize the mother over the embryo in these 
cases, but not in other cases?  And, if a woman who was raped should not
 have to bear her rapist's baby because the pregnancy was unexpected, 
why shouldn't women with other unexpected pregnancies be allowed to have
 an abortion?  Moreover, Luker notes that anti-abortion laws in the past
 had an exception for the life of the mother, with the result that some 
doctors interpreted that exception strictly, whereas others 
interpreted it broadly (since one could arguably be saving a mother's 
life through abortion if the pregnancy would harm her mental health or 
lead her to suicide).  
Luker refers to pro-life attempts
 to justify abortion to save the life of the mother.  One way is to say 
that this occurs rarely, but Luker responds that its lack of frequency 
has nothing to do with whether it's ethical or not.  Another way
 is to say that directly killing the embryo through abortion is wrong, 
but performing a procedure that has the consequence of taking the 
embryo's life (even though that is not the procedure's main purpose) is 
acceptable.  For example, on page 231, Luker refers to the view
 of Thomas Bouscaren: "In the case of ectopic pregnancies, where an 
embryo begins growing in the Fallopian tube rather than in the uterus, 
Bouscaren argued that although it would be wrong to surgically remove 
the embryo, thus causing its death, it would be acceptable to remove the
 diseased tube, thus causing the death of the embryo indirectly."  Luker's problem with this argument
 is that it emphasizes the subjective intent of the physician.  A third 
way is to treat the embryo as an "unjust aggressor" when it threatens 
the life of the mother, and thus it can be aborted, the same way that 
killing an aggressor is justified for the sake of self-defense.  But 
Luker does not think that portraying the embryo as an "unjust aggressor"
 will help the pro-life cause.
Regarding pro-life treatment of the
 rape exception to an abortion ban, Luker says on page 235: "Most of the
 pro-life people we interviewed said that women who are raped simply 
don't become pregnant very often, and many of them said they thought 
this was because something biological happens to rape victims that 
precludes the possibility of pregnancy."  This sounds like what 
Todd Akin said, which means that Akin was probably drawing from a belief
 that exists within the pro-life movement, at least as early as the 
1980's.  Luker does not agree with this view, for she said that
 women "who promptly report the rape" don't become pregnant very often 
because they undergo procedures that eliminate pregnancy "in its 
earliest stage" (page 235).
On the pro-choice side, Luker says 
that its emphasis on women being able to do what they want with their 
own bodies can strike people as rather selfish.  But it was mainly 
Luker's treatment of the pro-life side that brought to my mind 
discussions that I have had and things that I have read about abortion. 
 In college, a pro-choice friend of mine once asked me why we should 
have an exception for the life of the mother, when that exception 
assumes that the mother is more valuable than the embryo.  He was 
probably wondering why, if I were to regard the mother as more important
 in that case, I couldn't regard her as more important in other cases, 
as well.  My friend did not buy into the "unjust aggressor" argument, 
which he read in one of Ronald Reagan's anti-abortion writings, for my 
friend said that the embryo was not intentionally causing the mother's 
death.  I also heard the argument that it's acceptable to indirectly 
cause the death of an embryo when I was talking on the phone with a 
pro-life, pro-family activist, looking for an internship in a Christian 
conservative organization, and I've come across it when reading the 
views of Republicans who don't believe in an exception for the life of 
the mother.  Usually, they say that a procedure to save the mother's 
life whose intent was not to kill the embryo, but which ends up killing 
the embryo, is acceptable.
When it came to exceptions, they did not particularly disturb me when I was more of a pro-lifer.  Granted,
 I could not answer my pro-choice friend's question of why we should 
regard the mother's life as more important when an embryo was 
threatening it, but I didn't think that this one ambiguous case was 
enough to overthrow the entire notion that, in most cases, a woman 
should not be able to kill her unborn baby.  After all, there are 
exceptions to all sorts of ethical rules (i.e., don't kill), but that 
does not invalidate the rules.  And yet, there are usually sophisticated
 philosophical justifications for those exceptions.  Luker does not 
think that there is a sufficient justification, however, for pro-lifers 
to allow abortion to save the life of the mother.
There's something that I wonder, though: Couldn't
 arguments that pro-choicers use to justify abortion also be used to 
justify infanticide?  If a mother can justifiably have an abortion 
because she can't afford to raise kids or feels that she wouldn't make a
 good mother, why couldn't she justifiably kill her children for those 
reasons after they come out of the womb?  On some level, Luker 
interacts with this question on pages 229-230, as she points out what 
she feels are weaknesses in pro-lifers' exception for the life of the 
mother:
"Thus the dilemma: if all embryos really are 'babies' and 
by definition 'innocent' and physically dependent, on what moral grounds
 can the lives of some of them be ended?  For example, it is not hard to
 imagine that the activities of a healthy, active three-year-old could 
threaten the life of an overburdened, anemic mother with active cardiac 
disease.  But even the most active abortion supporter would recoil from 
the suggestion that this three-year-old should have its life ended in 
order to save the life of its mother.  In part this is common sense: 
three-year-olds can be cared for by others, but embryos, at least for 
now, cannot.  But if pro-life groups concede that the physical 
dependence of embryos makes them different in this critical way from 
already-born children, then they have seriously called into question 
their own argument that there is no moral difference between an embryo 
of three days and a child of three years."
Luker is pointing out 
what she believes is a weakness in a pro-life position that has an 
exception for the life of the mother: if an embryo's life can be taken 
because it threatens a mother's life, why couldn't the life of an 
already born child be taken when it threatens a mother's life----if the 
mother has heart problems, for example?  But I think that the same sort 
of question can be asked regarding the pro-choice position, and so 
pro-choicers need to address more fully why abortion is acceptable, but 
taking the life of an already-born child is not.  A pro-choicer 
can say that an already-born child is part of a social network, but I 
think that we're on slippery ground if we assume that this is what gives
 someone value as a living human being.  After all, some people after 
their birth aren't social or particularly cared for by their family or 
others, and yet I doubt that pro-choicers would deny their right to 
live.  Perhaps a pro-choicer could say that a mother could give
 her child to someone else after the child is born, whereas she can't 
while she is still pregnant, but why couldn't a pregnant woman make 
plans to do that after the child's birth?
In any case, I think that both pro-life and also pro-choice positions are rather slippery.