The production of life is a process. It is a question of when it starts, when it becomes inevitable, when, for example, ensoulment takes place. I regard the embryo in this case as potential life. Life does not become possible without implantation. There is a continuum from the egg and the sperm at conception to implantation and development. At what point does this process become irreversible? It would be easy to say, " yes, there it is, bang". The more people begin to understand the complexities of these issues, the more difficult it is to make that an absolutely fundamentalist position. I use the word "fundamentalist" in a non-derogatory sense.