blastocyst

A donor blastocyst is used as a host.

Now, take some stem cells from the blastocyst and replace the DNA with the patient's DNA.

A normal adult human is an agent, and a blastocyst is not, but there is no bright line where agency is bestowed.

Because of the massive imminent backdraft, I have time only to save either the old lab tech, Fred, or a shelf of petri dishes containing 10 million blastocysts.

In contrast, if the oocyte genome is not removed and the somatic cell genome is merely added, the resultant triploid cells develop to the blastocyst stage.

Our understanding of how viruses attach to healthy cells, or how blastocysts differentiate into stem cells is all contingent upon our ability to observe these processes in vivo.

Then regenerate the telomeres and replace the DNA in the germ layers of a blastocyst and you have the foundation to replace 50+ years worth of cells, plus provide a digital copy of the DNA for the next treatment round.

Stem cell lines derived from these blastocysts differentiate into cell types of all three germ layers, and a pluripotent gene expression program is established on the genome derived from the somatic cell.

At a particular stage of development, implanting a number of ES cells from the desired clone into the center of the blastocyst induces the donor blastocyst to develop into the placenta, while the ES cells continue development as the fetus.

Your reply to my quotation of Wikipedia's claim "the Catholic Church opposes all forms of abortion procedures whose direct purpose is to destroy an embryo, blastocyst, zygote or fetus..." at that point was:"you are correct for the modern church, but there is a history..."which I understood that you mean that there was a time in history when the Church didn't "oppose all forms of abortion procedures whose direct purpose is to destroy an embryo, blastocyst, zygote or fetus," contrary to what it does as "the modern church.