The genome of new individual is completely defined when meiosis - merging of male and female cells - is finished. It is a moment when soul joins so far very small cluster of life, single cell, to form human being. Surely that is the moment when new individual gains moral right to be treated as a human.
It is very difficult to decide when it is morally acceptable to destroy this budding human. Certainly in exceptional cases only. Abortions should form part of statistic about life expectancy etc. We may be surprised - first few months are probably most dangerous time during existence of individual. If one survives them he is likely to live almost century. And we may be surprised to find out who is the most dangerous enemy. It seems obvious that numbers are way too high and that society should do its best to lift its game.
That said, there seems to be little in favour of making abortion more difficult and dangerous than necessary. Perhaps we should go ahead with RU-486 but we should also search earth and sky for new ways how to limit numbers of abortion. With dignity for both mother and child.