Which makes me wonder if they really value the lives of the preborn as much as they say they do.

I think the pre-born are all that matters to them. A lot of the people who are pro-life are also anti-universal health care, anti-welfare, anti-raising taxes for education, pro-death penalty.* Once that sucker pops out of the womb, it's every baby for himself. Life is only sacred when it's potential, not when it's real.

*Seriously. There have been studies and polls and everything to demonstrate this but I'm too sleepy to research and cite it properly.