If you’re looking for information to bring into a discussion about whether life begins at conception or not, take a look at the M. Ko’s article:
“Recent advances in the systematic molecular analysis of preimplantation embryos are summarized, including the molecular identification of nearly all genes involved in preimplantation development and their detailed expression patterns. Notwithstanding a quantum leap in molecular understanding of preimplantation embryos, molecular evidence seems to provide no decisive definition of a threshold for the beginning of human life during preimplantation development.”
Despite attempts to legislate otherwise, perhaps one conclusion we can draw from this is that life never begins per se- it only continues…..

