Discrimination for some but not others?

At the Abortion Gang blog, KushielsMoon is maddened by the story of a couple in the UK who aborted their child with Down Syndrome after a nurse and a consultant continuously pushed abortion on them. KushielsMoon's solution:

"The way to fix this is clear: stop discriminating against people with special needs. Instead, value those with special needs within our society."

But, wait. Don't the unborn happen to be human beings with special needs? And doesn't allowing their intentional destruction discriminate against them?