The level of development of my clone would govern whether or not I had any qualms about harvesting him. If he is embryonic and I can make multiple copies of him, I harvest away as needed. If he is my twin by natural childbirth, I couldn’t possibly do the same thing, for all the obvious reasons.
Please re-read the article or the original report. http://www.liebertonline.com/doi/pdfplus/10.1089/clo.2007.0033
There is no “cloning.” The chromosomes in the haploid oocyte are induced to copy themselves and the new embryos are nurtured through the early stages of development, until there is a blastocyst, with a trophoblast and an inner cell mass.
However, I am interested in your “obvious reasons” for not destroying your “natural twin.” Please explain.
How comes? What makes an embryo less human than a newborn? From a purely biological point of view, life is a continuum. We use terms such as zygote, embryo, fetus, newborn, child, teenager, adult... merely to indicate the level of development, to make communication simpler. But there's nothing in the zygote that makes it any less human than an adult astrophysicist! From a religious point of view, we are known and called by God from the womb (Isa 44:2, 24) and we are commanded to save lives (Prov. 24:11-12).