I am no expert on hip hop, but from what I have read, the subject of abortion is addresses in hip hop more than any other type of music. Specifically, there are quite a few hip hop songs that take an anti-abortion position. I can mention a few I've read about, including "One Mic" by Nas and especially "Real Killer," by Tech N9ne. I looked up the lyrics for the later and it's quite a chilling and fearless song. I've also heard about "abortion," a song from the 80's by Doug E. Fresh, but I don't think I could find the lyrics to that one.
Popular Hip Hop artist Common has a nice pro-life song, entitled "Retrospect for Life", here are some of the lyrics,
"from now on
I'ma use self control instead of birth control
Cause
$315 ain't worth your soul
$315 ain't worth your soul
$315 ain't worth it"
http://www.lyricsondemand.com/c/commonlyrics/retrospectforlifelyrics.html
Self ping for later googlizing
That would be most appropriate, since abortion basically amounts to genocide against American Blacks. Three out of five Black children don't make it out of the womb.