The primary source for Rand’s view on abortion is her article “Of Living Death” (from The Objectivist, 1968; reproduced in the collection titled “The Voice of Reason”). If Rand thought abortion was moral up to a certain point before birth, and then immoral from that point until birth, she would surely have said so in this essay. It is not plausible to think that she would have only revealed the notion obliquely in an article about voting for Reagan. The essential view that Rand was fighting against was the Christian view that legally-protected human life is created at fertilization. If her essential view was that legally-protected human life started at the 13th week, is it plausible that she would not make it amply clear in her primary essay on the topic?
In the article you quoted, she is explaining a political choice: why she would not vote for Reagan. Even here, she refers people to her “Of Living Death” article. She also referred people to that article after a brief answer to a question at Ford Hall Forum in 1971 and again in 1976 [see, "Ayn Rand Answers].
The essential issue in the abortion debate in the U.S. is all about fertilization (sometime, rarely, it is about implantation). In the U.S., almost all abortions (91%) happen in the first trimester, a small percentage (9%) in the second and almost none in the third. People like Reagan and every viable Republican candidate base their arguments solely on the mystical notion of life coming into the fetus sometime near the point of fertilization. Their argument is not about viability, because they do not believe viability is the key moral issue. The essence of their argument is that a clump of cells is a legally-protected human being. That’s the essential political issue.
During an answer to a question at Ford Hall Forum (1971), Rand said that medically “you” could argue that an embryo is alive at six to eight months. Extempore answers must be treated with care, and may not always reflect the speakers accurate view without the benefit of editing. Still, with that caveat, notice a few things about this answer: firstly, she is talking about the third trimester rather than the second; secondly, once again, she does not claim this to be her view, but is saying that “you” could argue. However, here is the clincher: in the span of that very same answer she said that life starts at birth.
My initial reaction to your post was mainly because you framed it as if Objectivism holds that abortion is immoral after 12 weeks. Clearly this is not the case. Now, you could argue that Rand was against restrictions on abortion, but appeared to show some flexibility after the first trimester. However, it is unlikely that she actually was flexible about it, since she also stated that life begins at birth during an answer where she spoke about “six to eight months”. The fact that she stated the trimester “exception” in the third person both times – “one may say” and “you may say” – further reinforces the evidence that this was not her view.
So, in your opinion, what is the meaning of this statement? Clearly, while discussing abortion, Ayn Rand considered essential to this issue only the first 12 weeks of pregnancy.
Rand was extremely vehement about people who wanted to ban abortion. She actually called them “bitches” (Ford Hall Forum, 1974). However, the view that actually riled her up is the notion that a clump of protoplasm should be given rights. She was obviously aware of views on viability – views which would say that abortions were okay only during the first trimester, or only during the first and second. I doubt she thought such people were irrational, vicious “bitches”. My reading of this is that, to Rand, the standard religious/GOP view is so obviously ridiculous and vicious that it deserved a strong, emotional assault, and even the label “bitches”. However, the view on viability was a different issue, and one where she could at least see where people would have a non-mystical, non-vicious argument.
However, just because viability is a different issue does not imply that one agrees with it. I see Rand attacking the mystical view, and clarifying – as an aside – that the viability view was a different issue. I do not see her agreeing with the viability view.
My personal view is similar to Rand: I think the life-at-fertilization view is completely irrational, but I can see how someone rational may argue that a viability is the right point. I disagree vehemently with making viability the line, but I can at see that it is a radially different argument from the fertilization viewpoint. However, the reason I responded to your post was not because of the view, but because you were ascribing it to Objectivism.
If someone wants to argue that Rand might have supported viability, I think that’s wrong and lacking in evidence. However, stating that Objectivism does support a viability argument is blatantly false.