Ultimately, if a teenager gets pregnant, it's her parents problem -- yes, abstinence is a wonderful thing, but if you have raging hormones and unsupervised teens, it's a pretty good bet that someone might turn up pregnant. Personally, I think that with an infant with Down's Syndrome, and a teenage mother on the way, Ms. Palin might find more prudent to be at home with her family, as both of those conditions require a helluva lot of time and hands on care. On a personal viewpoint, the amount of sex education I recieved from my mother was 'If you get pregnant, I will kill you.' Considering her personality, I didn't dare mess around.
As to the abortion question, I think a woman should always have the right to choose for herself whether or not to full term with a child, and have the option to terminate or not, and have safe medical care. In the end, it should be _her_ decision, and not one for the religious right or politicians to decide. Yes, I had to make that choice once, and it was a godawful decision. In the end, it turned out to be right one. I don't know of any woman who made the decision to have an abortion making it on a whim. And I never want to hear of women having to resort to self-abortions or going to some hack of a doctor to get one, because of right wing moralizing men (as most anti-abortion fanatics are) deciding that all life is holy.
If it's so sacred, then get programs in place to help those who need it in both the pre term and post-term births, and help them raise healthy, well-adjusted children who can prosper. Otherwise, it is hypocrisy at the worst, and just another means of controlling women.
Sorry to be so longwinded here, but it's an issue that I feel very strongly about.