Reena,
First, let’s dispatch with your hypothetical.
1.) Abortions are done after the cells of the fetus have differentiated to the point that the cells no longer qualify as the Totipotent “Fetal Stem Cells” that are being touted for research. So they wouldn’t address the supply sought for these “immortal” cell lines.
2.) The only cells remaining in the fetus that have this full potential are the future reproductive organs of the fetus and these are surrounded by other healthy tissues, making their harvest difficult.
So, their potential as a source of stem cells is not great. The same can be said for the placenta and umbilical cords. These tissues are contaminated in the course of the abortion and would be very difficult to use for the purposes of stem cell research.
YinYang, in the case of a natural miscarriage, typically by the time the D&C occurs the tissue has been dead and is no longer viable for culture.
OK, now, onto the ethical aspects. Your question has been answered a number of times. Please note that the Catholic Church has infallibly taught that abortion is an absolute evil act and nothing good can come from it. I have had to learn, over the course of many years and many objections on my own part, that when the Church speaks infallibly, it’s right and no amount of arguing and pushing on it can change that fact.
The way I finally came to terms with this was by 1) accepting a difficult (for me at least) teaching, 2) obeying the church even though I didn’t really understand how the church could be right, 3) seek to better understand why the church taught as it does (which you apparently are doing here). What’s weird is that very soon after, I came to fully appreciate that with which I had wrestled for years. But I fully believe it took steps 1 and 2 before step three worked for me. It happened for me on a couple of big issues I’d had with the teachings of the church, and in a fairly short period of time as well. So, I now accept that if the church (the Magesterium, the Pope and the Bishops in union with the Pope) teaches it, it’s true. That’s what Christ promised, so that’s what we’ve got.
And please know that the reason the drug companies want the fetal stem cells is because they can patent them and make lots of money if they ever manage to find a cure. With adult stem cell lines, it’s just a procedure that results, and that can’t be patented, hence less money to be had. And the fetal stem cells require a significant amount of differentiation that hasn’t yet occured naturally before settling into a beneficial cell type. Much of this difficult work has already occured when you use the adult stem cells.
And, yes, there have been NO instances of a cure or treatment from fetal stem cells (although there may some day be, that won’t change how wrong it is) and there have been nearly a hundred cures / treatments using adult stem cells.
Hope this helps.
God Bless,
CARose