Disclaimer: I am pro-choice. This is my opinion and mine only.
If you're interested in a rebuttal to the Pam and Tim Tebow Superbowl ad, both Planned Parenthood and Jimmy Kimmel have one for you. I like both messages, "trust women" and "They don't all turn out like Tebow" (although the latter is obviously tongue-in-cheek and not meant to be taken seriously), because they point out that the reason we have these heartwarming stories of women who chose life, and realized it was the right choice for them, and went on to raise wonderful children is precisely because that choice was available to them, and so today the women we observe who chose not to have an abortion are the women who wanted to carry out their pregnancies, and the women we don't observe are those who decided not to. Imagine how different it would look if all women were forced to carry out their pregnancies instead. The value of choice is actually what's responsible for both Pam Tebow and Sarah Palin's heartwarming stories, contrary to what they may peddle. They both talk about what a good choice they made for themselves, after considering the implications of dangerous and unexpected pregnancies, and then go on to recommend denying other women the same option. Pam Tebow almost didn't have that choice, as abortion was illegal in the Philippines at the time she became pregnant, and must have only been offered to her as an option due to the special circumstances. Her story, her decision, and the Heisman trophy winner that came after, are a celebration of choice as much as they are of life.