This is a silly thing to ask when >95% of abortions are elective procedures. Less than 0.2% of all abortions are for cases of rape or incest. Pointing out these cases as some "gotcha" to own pro-lifers is misrepresenting your own position.
That being said, no. Carrying a pregnancy to term is extremely dangerous for a young child. The parents in cases like these should be able to consent to an abortion for their daughter and, in cases where they won't, a judge should step-in and order one. I think that should generally be the rule for any girl younger than 13.
No it's not a silly question. Plenty of pro choicers, including democratic politicans are asked whether they support statistically insignificant late term abortions, and any ridicule or contempt they recieve for being to cowardly to own up to an unpopular position is not in anyway a "gotcha", so I fail see the issue in holding pro lifers to the same standard.
Trying to make late-term abortions an issue is also a lame "gotcha", since it's a vanishingly small number of abortions that are performed at this stage (and never without reason.) Both sides need to be more honest about what they're really advocating for.