Voco Pro Tatiano has said:
[sign]The Human soul, according to Church teaching, as I understand it, reflects the indivisibility, and immergibility of the born human, (ignoring for the moment conjoined twins), and so is seen as such.[/sign]
Yes, I have been meaning to get to the issue of the human soul which seems to be the core of our failure to understand one another. Indeed, Voco you are correct the Church teaches the soul is indivisible. However, and I do ask for your continued patience, but I’m not familiar with this word which you are so fond of: "
immergibility". From other posts your suggestions about the sexual gametes each containing a soul has left me scratching my head frankly.

In post #49 you made this claim. Elsewhere you said the sperm and the ovum are animated by “micro-souls” and that these “micro-souls can fission”.
Do the parents contribute more to the new human embryo than just matter ie.: the body? Do they contribute to the soul of their offspring also? No. This idea was condemned by the Church a long time ago. She has stated unequivocally: G_d alone creates an immortal soul for each individual human child. It did not exist before in some huge amorphous one soul which is waiting to be shared with the latest member of the human race. It cannot be divided into pieces from the parents and shared with the unborn child. The soul does not pre-exist. It comes directly from G_d and returns directly to Him after death.
Yes, while I agree the sexual gametes contain human life they are not to be confused with a new, genetically unique, single-cell human being which comes into existence at fertilization. What happens at fertilization is radically different from the process of gametogenesis which brings mature sexual cells to the point where they are ready to play their role. After fertilization is complete neither the sperm nor the oocyte continue to exist. Their contribution is complete, finished. Neither of the sexual gametes can survive long once released. The sperm will die in seven days if it hasn’t entered an oocyte successfully and the oocyte has only a twenty four hour window where it can be fertilized before it too dies. The earliest embryo however is self-sufficient and self-directed.
Dr. Jerome Lejeune who was a professor of Fundamental Genetics in the Faculty of Medicine of Paris, and was the first to discover the chromosomal mistake that causes Down Syndrome summed it up best:
[sign]To accept the fact that, after fertilization has taken place, a new human has come into being is no longer a matter of taste or of opinion. The human nature of the human being from conception to old age is not a metaphysical contention. It is plain experimental evidence.[/sign]
lifeissues.net/writers/lej/lej_02whenlifebegins.html