We seem to have done it to quite a few newborns as well, though. If Peter Singer has his way, there would be centers set up where parents could "turn in" their infant for the first 6-12 months of life, because the infant is disabled in some way or they just don't like it.
Peter Singer recently was given a very honorable chair at Princeton University, in spite of writing a book advocating infanticide as described above. Singer teaches ethics and philosophy at Princeton, I think.
I've read some of Peter Singer's writings. He frightens me, truly.
I wonder if he has much humanity left in him.