Speaking of John Piper (in the bottom of my last post...)
At the Desiring God web site, there is a wonderful sermon by John Piper entitled Abortion, Race, Gender, and Christ.
His thesis, which he backs up with hard data, is that abortion is often both racist and sexist. It is sexist in that abortion is often used as a method of sex selection in China and India (guess which sex is often prefered...) and racist in that is it practiced in disproportionately high numbers by minorities, especially blacks.
The biblical basis for this sermon is Exodus 1:1-22, where Pharoh orders the destruction of all male Jewish babies. Even in ancient times, abortion (infanticide) was all about race (Jews) and sex (boys).