Saletan on twin reduction: Why do they trouble pro-choicers?

After listing examples of pro-choicers who don't like twin reduction, William Saletan argues pro-choicers are troubled because they can't pretend unborn children are non-humans in twin reduction like they can in abortion.

Look up any abortion-related item in Jezebel, and you'll see the developing human referred to as a fetus or pregnancy. But when the same entity appears in a non-abortion item, it gets an upgrade. A blood test could help "women who are concerned that they may be carrying a child with Down's Syndrome." A TV character wonders whether she's "capable of carrying a child to term." Nuclear radiation in Japan "may put unborn children at risk."

This bifurcated mindset permeates pro-choice thinking. Embryos fertilized for procreation are embryos; embryos cloned for research are "activated eggs." A fetus you want is a baby; a fetus you don't want is a pregnancy. Under federal law, anyone who injures or kills a "child in utero" during a violent crime gets the same punishment as if he had injured or killed "the unborn child's mother," but no such penalty applies to "an abortion for which the consent of the pregnant woman … has been obtained."

Reduction destroys this distinction. It combines, in a single pregnancy, a wanted and an unwanted fetus. In the case of identical twins, even their genomes are indistinguishable. You can't pretend that one is precious and the other is just tissue. You're killing the same creature to which you're dedicating your life.