You mentioned that you notice few (if any) women on this thread. I am one :) I left a comment above and you can read some of my notions there, if you are interested.
If an unwanted pregnancy is something a woman theoretically decides upon (pro or against), she might change her stance when the matter of fact indeed happens.
As much as of an opinion I might have, I never was in the situation to make this decision. I call myself lucky, this cup never came into my direction. And it won't; I am past the years.