As a faithful Catholic the pro life issue is a big one for me. I just started reading a new blog tackling the subject purely from the Natural Law perspective.
Naturally Prolife looks to the Natural Law as defined by St. Thomas Aquinas and as expounded by the Magisterium epecially Bl. John Paul II. The blog's author Christopher Apodaca, writes meaty articles that examine the issue and tear it into bite sized thoughts without watering down the arguments.
His scholarship is evident throughout as his articles are chock full of quotations from Aquinas, JP II, and others such as C.S. Lewis.
I'm sure Apodaca's isn't the only blog to tackle the Pro-Life issue from this perspective, but the strength of the writing and the ability to take such a difficult argument and boil it down make his blog worth reading.
In the interest of full-disclosure, I know Chris, we went to school together. He is an incredibly well reasoned man and a faithful Catholic. Don't let the fact that I know him keep you from reading his blog though it is good stuff.