If we support abortion, then on what basis will we say no to 'selective abortion'. After all a woman may also have the right to decide what kind of children she wants in to the world. In my country, killing of female foetuses is assuming a huge proportion as a problem. People use technology to find out if the foetus is female, and then they kill it. Tommorow science will give us a greater insight and thereby control over the qualities that we want in our children. And then what would stop us from killing foetuses that will have the qualities we don't want, because of our biases.